GENERAL REGULATIONS PDF

GENERAL REGULATIONS SECTION 301 DISPOSAL OF WASTE WATER - disposal of waste on any place is prohibited SECTION 302 GRADE OF HORIZONTAL DRAINAGE PIPING - Slope 20mm per meter or 2% less than 102 mm dia. *Exception...

GENERAL REGULATIONS SECTION 301 DISPOSAL OF WASTE WATER - disposal of waste on any place is prohibited SECTION 302 GRADE OF HORIZONTAL DRAINAGE PIPING - Slope 20mm per meter or 2% less than 102 mm dia. *Exceptions a.excessive depth of the proposed drainage line b.structural / geological features of terrain c. existing adverse in arrangement of building or structures Note 10 mm per meter or 1% slope of 102 mm or larger SECTION 303 CHANGES IN DIRECTION OF DRAINAGE FLOW - 1/16 bend or 22.5 degrees - 1/8 bend or 45 degrees - 1/6 bend or 60 degrees SECTION 303.2 *HORIZONTAL to VERTICAL Change of direction a. Wye combination b. Double sanitary tee c. Sanitary tee d. Combination wye and 1/8 bend SECTION 303.3 *HORIZONTAL to HORIZONTAL a. 45 wye branch b. Combination wye and 1/8 branch SECTION 303.4 *VERTICAL to HORIZONTAL a. 45 branches Long sweep 60 Offset b. Combination wye and 1/8 branch SECTION 304 CONNECTIONS TO PIPING SYSTEMS REQUIRED - all plumbing fixtures must connected properly to the drainage system SECTION 305 SEWER REQUIRED - mandatory building sewer connection to public sewer - provision of septic tank, when public sewer is not available ( 62 meters distance from the public sewer ) SECTION 306 DAMAGE TO DRAINAGE or SEWER SYSTEM - deposit of any person that could damage the system is prohibited - Rain water for Storm sewer - Soil and Waste Pipe for Public or Sanitary sewer Note *Septic Tank for House (watertight) *STP for Condominium SECTION 307 INDUSTRIAL WASTE - Industrial Waste shall be treated shall not be discharged into ground or any waterway SECTION 308 LOCATION - No plumbing system located on another lots other than the lot of the building served SECTION 309 IMPROPER LOCATION - Interference with the normal operation SECTION 310 WORKMANSHIP - Accepted Engineering practices - Do not conceal cracks or holes and imperfections - Burped ends of all pipes and tubings shall be "REAMED" SECTION 311 PROHIBITED FITTINGS and PRACTICES - Prohibited fittings (Venting) * Double Hub Fitting * Single or Double Tee Branch * Single or Double Tapped Tee Branch * Side Inlet quarter bend * Running thread * Band or Saddle - Jointing of Hubless pipes - Neoprene Gasket - No drainage or vent - drilled and tapped - No Cast iron soil pipe - threaded - No waste connection shall be made to a Closet Bend or Stub of a water closet - No Vent pipe shall be used as a Soil or Waste pipe - Vice Versa - No Single drainage and Venting system that has no vent - No piping connections that Retards/obstructs flow of air, water and sewage - enlargement of closet bend or stub from 72 mm to 102 mm diameter shall not be considered Obstruction - Gate and Check valves should have an Accessible connection - Valves, Pipes and Fittings shall be installed related to the direction of flow SECTION 312 INDEPENDENT SYSTEM - Provision of independet connection with a private or public sewer SECTION 313 REPAIRS AND ALTERATION - Notification of the owner to the admin whenever there are necessary changes to conform - All openings in drainage and vent systems shall be permanently Capped or Plugged SECTION 314 PROTECTION of PIPING, MATERIALS and STRUCTURES - piping should be protected from breakage by Embedded metal pipe sleeves - pipe protection for external corrosion by Polyethylene sheath - void between pipe and sleeves shall be sealed with Bitumen - no pipe shall be directy embedded in concrete and masonry - no structural member shall be weakened - Trenches deeper than footing and parallel to it must be 45 degrees *Zone of Effluence line 45 degrees - Building sewer installation should be between 0.3 meters and 0.6 meters below the finish ground surface - pipe protection subject to undue corrosion, erosion or mechanical damage *inside lining *outside coating *proper bedding *top shielding with concrete blocks SECTION 315 HANGERS and SUPPORTS - Vertical Piping *Types Supports a. Cast iron soil pipe every Storey b. Screwed pipe at every other Storey Height c.Copper Tubing 3 meters on centers every Storey d. Lead pipe 1.2 meters with vertical backup e. Plastic pipe 1.0 meter interval - Horiztontal Piping *Types Supports a Supports @ sufficiently close intervals to keep them in alignment and prevent sagging b. Cast iron soil pipes 1. where joint occurs 1.5 meters 2. when pipe exceeding 3.0 meters 1.5 meters length *supports @ 0.45 meters for Hub or Joint 3.Hubless or Compression every other joint Gasket Joints 4. When developed length each joint exceed 1.2 meters 5. Each horizontal branch connection 6. Suspended lines c. Screwed pipe *19 mm and smaller 3.0 meters *25 mm and larger 3.6 meters d. Copper tubing *38 mm and smaller 1.8 meters *51 mm and larger 3.0 meters e. Lead pipe entire length f. Piping in ground firm bed for entire length concrete cradle support g.Plastic tube *38 mm and smaller stiff metal or wood backing *51 mm and larger metal hangers - Hangers and Anchors sufficient strength piping shall be adequtely anchored or supported SECTION 316 TRENCHING, EXCAVATION and BACKFILL - tunnels shall have a clear height of 0.60 meters above the pipe , *minimum length 1/2 depth of the trench *maximum length 2.4 meters - when driven, drive pipe is atleast one pipe size larger than the pipe t o be laid - Open Trenches shall be backfilled in the layers 0.30 meters above the top of the pipe PLUMBING FIXTURES SECTION 401 MATERIALS GENERAL REQUIREMENTS - Quality of fixtures should be Dense, Durable and Non Absorbent should also have Smooth and Impervious Surfaces - Porcelain Enamel Surfaces acid resistant - Water Closet (public) elongated type SECTION 402 MATERIALS - ALTERNATIVES - Special use fixtures Soapstone , Chemical stoneware lined with Lead, Copper base alloy, Nicker copper alloy, Corrosion resisting steel - Restaurant Kitchen Sinks G.I. #16 U.S. B & S or 16mm thick SECTION 403 OVERFLOWS - overflow outlet waste arranged so that the standing water inside the fixture cannot rise inside the overflow way - overflow pipe shall be connected to the inlet side of the fixture trap - Water closet or Urinal flash shall discharge into the bowl served SECTION 404 STRAINERS AND CONNECTIONS - Strainers sum of all the areas of the perforations of the strainer is equal to the equivalent outlet area - Connections *slip joint - access panel or utility atleast 0.3 meter Seamless drawn brass not less than G.I. #20 B & S or 0.8 mm thick Tailpiece, continuous waste or overflow shall *not less than 38 mm O.D Sinks, Dishwashers, Laundry, Tubs Bathtubs and Urinals *not less than 32 mm O.D. Lavatories and Drinking Fountains Note Brass or Copper shall not be used for Urinal Tailpiece or Trap SECTION 405 PROHIBITED FIXTURES - Water Closet (prohibited) inivisible seals, unventilate space and having walls which are not thoroughly washed at each discharge - Drinking Fountain shall not be installed on Public toilet Rooms - Fixed wooden, Concrete, Tile, WASH TRAYS or SINKS shall not be installed on buildings for human habitation SECTION 406 SPECIAL FIXTURES AND SPECIALTIES - Water Connections on all special fixtures shall be protected from Back Siphonage - Waste Water drain for "SACRARIUM" shall be discharge direct to the ground SACRARIUM length 346 mm width 286 mm height 152 mm - Approved by admin authority SECTION 407 INSTALLATION - Cleaning 0.30 meters - distance of water closet to wall for easy access on repair and cleaning - Joints joint bet. Fixture and wall shall be WATERTIGHT - Screwing Fixtures Screws and Expansion bolts - Corrosion resistant - Wall hung fixtures shall be supported by Metal Supporting Members - Setting Wall Fixtures *urinal 0.30 m 0.60 m min. *water Closet 0.375 m 0.75 m min. - Supply Fittings shall be installed to prevent backflow SECTION 408 URINALS - Automatic Flashing Tanks for flashing more than 1 (one) urinals - Flushometer Valves manually controlled flushometer valve shall be used for flashing 1 (one) urinal only SECTION 409 FLOOR DRAINS AND SHOWER STALLS - Floor Drain considered plumbing fixtures - Shower receptor must be made of Vitrified China or Earthenware, Ceramic tile, Porcelain-enameled metal - Shower receptor of an approved type to have a DAM, CURB or THRESHOLD which is 25.4 mm (1") lower than outside floor - Dam or Threshold depth 51 mm to 228 mm (2' to 9") slope 2% to 4% width 559 mm wide door (min.) Note The minimum distance bet.the Door or Entry to the drain opening is 1.2 meters - Shower Compartments Area 0.6 m2 (min.) Encompassing Circle 762 mm diameter height 1.78 meters (min.) - Floors of public rooms shall be non skid surface - Gutters in public or gang showers shall have pounded corners and a slope of 2% towards the drain - Drain in gutters shall be spaced not more than 4.9 meters - Maximum Temperature of Hot Water 48.48 degrees celsius - Lead and Copper Sub pan Linings *materials 6 kgs.of asphalt felt *unit weight not less than 19.6 kg/m3 *thickness for copper Gauge #24 B&S or 0.5 mm thick pans - Joints Lead pans burned Copper pans soldered or brazed SECTION 410 PLUMBIING FIXTURE REQUIRED - as prescribed by the National Building Code SECTION 411 WHIRLPOOL BATHTUB - Requirements *removable panel for access to the pump *Circulation pump location should be above the crown weir *Pump and Circulation piping shall be Self Draining * Suction fitting should by approved on the listed standards INSPECTION AND TEST SECTION 501 INSPECTION AND TESTING - Scope in accordance to the approved plans and specifications - Advance Notice 3 days before the works is inspected - Responsibility permit holder will provide all testing needs - Retesting corrections shall be made and will submit another test for inspection - Test with the presence of the administrative authority - Corrections possible corrections will be written by the administrative authority and wil be given to the permit holder - Approval certificate of approval will be given after completion and final test - Covering or Use no system shall be covered prior to approval of the admin - Uncovering uncovered all covered plumbing prior to inspection and testing *SECTION 501.2 Testing use of Air or Water *Water Test Entire system - filled with water until to the point of overflorw Section System - all opening shall be closed or plugged except the highest opening and shall be tested not less than 3 meter head of water and will be kept at least 15 minutes Note The system shall be tight at all joints. *Air Test attaching an Air Compressor Testing apparatus air is force to a uniform Gauge pressure of 34.5 kpa or an equivalent 254 mm in mercury height for a period of 15 minutes Note Air Test 34.5 kpa Water Test 344.5 kpa  * Building Sewer Test shall be water tight at all points * Water Piping a 344.5 kpa of air pressure can be subtituted for water test for a period of 15 minutes *Defective Systems Air test shall be used in testing the tightness condition of the drainage and plumbing system *Moved Structures in case there is movement of prescribed work, it shall undergo a new test *Protectively Coated pipe *Test for Shower Receptors Shall be tested for tightness by filling the water to the level of the Threshold SECTION 502 MAINTENANCE - Maintaining the plumbing system in a Safe Sanitary Condition SECTION 503 - No change in any portion of plumbing system when it was installed and maintained already SECTION 504 HEALTH AND SAFETY - To eliminate Nuisance WATER SUPPLY AND DISTRIBUTION SECTION 601 RUNNING WATER REQUIRED - Adequate supply of potable water Note Left side Hot Water Right Side Cold Water SECTION 602 UNLAWFUL CONNECTIONS - No possible connection for entering of Unused, unclean, polluted or contaminated water, mixtures or substance to enter such piping - Provision of Approved Backflow Prevention Device - Avoid cross connections - Approved by administrative authority SECTION 603 CROSS CONNECTION CONTROL - Backflow Prevention Device Assembly *Air Gap unobstructed vertical distance thru free atmosphere bet. the lowest opening to the flood level rim of any fixture (for POTABLE Water) *Atmospheric Vacuum Breaker 1 body 1 Checking member 1 atmospheric opening *Double Check Valve Backflow Prevention 2 Check valves 4 Stop Cocks 2 Gate valves *Pressure Vacuum breaker 1 Air inlet valve 1 check valve 2 stop cocks 2 Gate Valves *Reduced Pressure Backflow Preventiom 2 check valves 1 Pressure relief valve 4 stop cocks 2 gate valve - GENERAL REQUIREMENTS * must have a Backflow prevention assemby tested by a Certified Backflow Assembly Tester atleast once a year  * Access and Clearance 305 mm (min.) bet.assembly and grade floor * Installations above 1.52 meters requires platform * Minimum Air Gap for Potable Water 25mm or 1" * connection may be made to the inlet side of a trap provided an approved AVB installed not less than 152 mm above the Flood Level Rim of the fixture * Backflow prevention for hot water of 43.3 degrees celsius or higher shall be an approved listed type - SPECIFIC REQUIREMENT * Water Closet and Urinal (Flushometer valves) AVB Critical level atleast 152 mm * Water Closet and Urinal (Ball Cock) Critical Level at least 25 mm above the full opening of the overflow pipe * Water Closet Flushometer tanks shall be protected against backflow * Potable water shall be separated from the fluids and gases by a minimum of TWO SEPARATE WALLS with a positive vented leak detection path * Inlets to Tanks, Vat, Sumps, Swimming pools and Receptors shall be protected by an Approved AVB wit a critical level of not less than 152 mm * Lawn sprinkling system shall be equipped with AVB installed on the discharge side of each of the last shut off valve * Potable Water outlets AVB shall at least 152 mm above the ground * Water Cooled Equipment water cooled compressors, degreasers shall be equipped with backflow preventer *Water inlets to water supplied aspirators AVB mounted atleast 152 mm above the aspirator unit *Potable Water, Potable Water for Carbonators shall be protected by Backflow preventiom * No backflow preventers shall not be located in any area containing fumes that are TOXIC, POISONOUS and CORROSIVE SECTION 604 MATERIALS - Water Pressure Pipes brass, copper, Centrifugal cast iron, B&S and F&F ends, Ductile cast iron, Galvanized wrought iron, Galvanized steel, PE and PVC - Hot and cold water distribution systems cPVC water pipe and tubing - Cast Iron Fittings when 51 mm (2") or smaller when in used in potable water piping shall be "galvanized" Read Water pipes and fittings with a lead content that exceed 8% shall be prohibited and not used in potable piping system SECTION 605 VALVES - Materials 51 mm or smaller Brass over 51 mm Cast Iron or Brass Bodies shall be on a full way type with working parts on non corrosive materials - Shut-off Valve shall be accessible at all times shall be installed near the tank or on the discharge piping from water supply tanks shall be installed on dwelling occupied by more than family *each Apartment - ONE (1) shut off valve *each Fixture - individual shut off valve GATE VALVE - WATER METER - CHECK VALVE - Fullway Gate Valve valve used to control 2 or more openings SECTION 606 GRAVITY SUPPLY TANKS - elevated or gravity stroge tanks shall be covered - The cover of tank shall be vented with a Return bend - Vent pipe having the same area of the Downfeed riser pipe *it shall be screened with a Fine Corrosion Resistant Screen with opening not less than 14 nor more than 18 mess per 25 mm - Control for Potable inlets for Gravity tanks to prevent Overflowing *Float Valve *Float Switch *Electrode Type Water Level Control - Gravity tank shall be provided with Valved Drain pipe and Overflow Pipe Screened SECTION 607 WATER PRESSURE, PRESSURE REGULATOR, and PRESSURE RELIEF VALVES - Iandequate Water Pressure Main source of Water supply =103 kPA *if not provided , a Hydro Pnuematic Pressure Tank or an elevated tank and booster pump will be used - Excessive Water Pressure when pressure exceeds 551 kpa, a pressure regulator is used *approved regulators with Integral bypasses are acceptable *all pipe size determination shall be based on 80% of the Reduced pressure * Pressure Regulating Device Storage water heating equipment shall have a pressure relief valve -Exceptions: having an inside diameter of not more than 76 mm Read Each PRV shall be an approved automatic type with drain and each such relief valve shall be set at a pressure not more than 1033 kpa *end of the pipe should be 152 mm to 0.60 m above the ground and pointing downward, and it shall not be THREADED or CAPPED SECTION 608 INSTALLATION, INSPECTION and TESTING - Installation * Burred end shall be reamed * all water piping shall be atleast 0.30 m below the ground * bottom of all water pipe shall be atleast 0.30 m above the sewer line * minimum clear horizontal distance bet. The shelf and drain shall be atleast 0.30 m * water pipes made of clay shall be laid a minimum of 0.30m above the sewer or drain line ** Ferrous Piping shall have an outside protective coating (field bitumastic and Fielding) ** Plastic Pipes abd Tubes need not to be wrapped for rust proofing Note Copper Tubing *Joints Brazed *Fittings Wrought Copper *Bitumastic Coating and External Protection Fiberglass Wrapping *Split Rigid Casing Underground - Inspection shall not be concealed or covered when not tested - Testing shall be tested and approved - Unions installed within 0.3 meters away from Regulating Equipment, Water heater, Conditioning Equipment which require removal SECTION 609 SIZES OF POTABLE WATER PIPING - Water Meter and Immediate Piping Based on TOTAL WATER DEMAND - Backflow Prevention Device shall be included in pressure loss calculations - Maximum Rated Flow and Pressure Loss shall be stamped legibly on the device Remember The quantity of water required to be supplied to every plumbing fixture shall be represented by FIXTURE UNITS - Water Piping Installation *Sizing ** Total number of FIXTURE UNITs ** Developed length of Supply pipe from Water meter to the most Remote Outlet ** Difference in elevation bet.the Water Meter to the Highest Fixture ** Water pressure in the street main ** Minimum Pressure available - Size of Water Meter and Building Supply Pipe (Table 6-6) Remember Water Service Pipe = 19 mm diameter (min.) 1 Psi = 6.895 kPA - Size of Branches designed by Taking the Total length of the Supply Piping from the source of cold water to water heater to the most remote hot water outlet and assessing the flow values of 75% of the Cold and Hot Water Demand - Water Conservation - Piping installed in Fire Resistive Protection - Hangers and Supports *Abrasion hangers and straps shall not compress, distort, cut, or abrade the piping and allow free movement of pipe *Supports **End of Branches and 4' or 1.219 meters Change of Directions ** allows free movement but restrict upward movement of lateral runs to avoid reverse grade ** vertical piping each storey or floor level ** alignment of vertical piping mid storey guide ** trap arms in excess of 3' or 0.914mm ** Closet rings fastened with 1/4" or 6.4 mm above finish Corrosive resistant fasteners floor SECTION 614 - Thrust Blocking *Installations a.Changes of Directions - Tees and Bends b. Changes in Sizes - Reducers c. Stops - Dead ends d. Valves *thrust block sizes will be based on a. Maximum line pressure b. Pipe size c. Kind of soil EXCRETA DRAINAGE SYSTEM SECTION 701 MATERIALS - Materials a. Cast Iron b. Ductile Iron c. Galvanized steel d. Galvanized wrought iron steel e. Lead f. Copper g. Brass h. Series 100 PVC - DWV i. Extra strength Vitrified Clay pipe Things to Remember *No galvanized wrought iron or Galvanized steel pipe shall be used underground, it shall be laid 152 mm above ground *ABS and PVC DWV piping - used in High Rise Buildings *No Vitrified Clay pipes or fittings for building drain or sewer, shall be used ABOVE GROUND or when pipe is Pressurized by a pump or ejector and shall be laid at least 0.30 meter the ground level *Drainage fittings shall be the same diamter as the pipes it serve and compatible with it - Fittings on Screwed pipe joints shall be Recessed Drainage type *Burred ends shall be reamed - Threads of drainage fitting shall be Tapped to allow 2% or 20mm/m slope *8 threads SECTION 702 FIXTURE UNIT EQUIVALENT - Maximum Trap Loading Table 7-1 Pipe size Fixture Units 32 mm 1 38 mm 3 51 mm 4 76mm 6 102 mm 8 - Size of Drainage Piping The minimum size of Vertical or Horizontal drainage pipings will base on the TOTAL FIXTURES UNITS connected thereto. * for continuous flow, 2 F.U. shall allowed for 0.063 L/s of flow 0.063 L/s = 1 Gal/m SECTION 704 FIXTURE CONNECTIONS (EXCRETA DRAINAGE) - Two fixtures set side by side or back to back with in the distance allowed by a trap and its vent, may be served by a SINGLE VERTICAL DRAINAGE PIPE SECTION 705 CHANGES IN THE DIRECTION OF FLOW EXCRETA DRAINAGE FLOW - Change of Direction for Drainage a. 1/16 bend or 22.5 degrees b. 1/8 bend or 45 degrees c. 1/6 bend or 60 degrees - Horizontal to Vertical Change of Direction a. 45 or 60 degrees Wye branch b. Double Sanitary Tee - may be used when the barrel of the fitting is atleast 2 pipe size larger than largest inlet - Horizontal Drainage Lines connecting to horizontal drainage line shall connect to a 45 degrees wye branch, combination wye and 1/8 bend - Vertical Drainage Lines connecting with horizontal lines shall enter through a 45 or 60 degrees branch, or offsets may be used only when installed in a True Vertical Position SECTION 706 CLEAN OUTS - Provision of Horizontal Drainage pipe shall be provided with a Clean out at its upper material *15 meter length - Maximum distance Table 7-4 Pipe Size C.O. Size Threads per 25.4 mm 38 mm 38 11.5 51 mm 38 11.5 64 mm 64 8 76 mm 64 8 102 mm or 89 8 larger Exceptions a. CO may be ommitted when Horizontal drain line is less than 1.5 meters unless serving a Sink or a Urinal b. CO may be ommitted on a short horizontal drainage pipe installed at a slope of 72 degrees or less from the vertical line (1/5 bend) c. An approved two way CO fitting can be installed bet.the Building sewer or Building drain d. Additional CO provision exceeding a 135 degree offset angle of direction  e. Each CO shall be installed that it opens on the direction of flow or at a right angles there to f. Each CO extension shall be considered as drainage and 90 degrees CO extension shall be extended from a wye branch g. CO shall be outside of the interceptor h. CO installed with cover plate shall be above Grade i. CO installed on 51 mm piping or less shall have a clearance of 305 mm in front of CO *Piping Clearance 51 mm or less 305 mm larger than 51 mm 450 mm underground piping 450 mm vertical 750 mm horizontal (wall) j. No underfloor CO shall be located more than 6.1 meters from any access k. CO fittings shall not be less than in size in Table 7.6 l. CO shall be provided for Pressure Drainage Systems m. Countersunk CO shall not be installed to be a hazard n. When a hubless pipe plug is used for CO, the coupling and plug shall be accessible SECTION 707 GRADE OR HORIZONTAL EXCRETA DRAINAGE PIPING - Standard Slope of drain pipes 20 mm/m or 2% Note If it is impractical due to the depth or length of pipe to obtain 20mm/m or 2% 102 mm pipe diameter or larger can have a slope of not less than 10 mm/m or 1% SECTION 708 GRAVITY DRAINAGE REQUIRED - All plumbing fixture shall be drained into the public or private sewage disposal system by GRAVITY SECTION 709 DRAINAGE OF FIXTURES (BELOW THE UPSTREAM MANHOLE or BELOW THE MAIN SEWER LEVEL) - Drainage piping shall be protected of backflow - Drainage piping below the crown level of the main sewer shall be discharged into an Approved Watertight Sump tank - Minimum Discharge Pipe =50.8 mm diameter for water closet connection - Vertical discharge line from pump shall be provided with a CV and GV close to the horizontal line - Drain shall be adequately sized to prevent overloading 2 F.U. = 0.06 L/s of flow - Mechanical devices shall be accessible and must be protected by a water tight masonry pit with cover - drainage and venting shall be installed under this code - Sumps and water tanks shall be constructed by an approved materials - All water tanks for public use shall have pumps incase of failure for overload *the invert of the lowest inlet to the tank shall have a min. distance of 51mm or 2" above the highest water starting level - Tank covers shall be Bolted and Gasket type *vent is required and shall extend thru roof *no vent from an air opening sewage shall connect to other vents - Air Tanks maintained pressure shall not be less than 3kg for each meter of height of the sewage when raised *no water operated ejector shall be permitted - Subsoil drainage shall dishcharged on an approved receiving tanks SECTION 710 SUDS RELIEF ( Bula) - No connection of suds relief fixture within 2.4 meters of any vertical to horizontal change of direction *Suds producing Fixture a. Bath tubs b. Laundries c. Washing Machine d. Kitchen sinks e. Dishwashers Exceptions 1. single family residences 2. 3 Storey of Plumbing Fixtures (stacks) INDIRECT WASTE PIPING, WET VENTED SYSTEMS and SPECIAL WASTE SECTION 801 INDIRECT WASTE CONDITIONS - No evaporative cooler, air washer drain's shall not be directly connected to any soil or vent or waste pipe * it should be drained thru an indirect waste pipe, discharge through an AIR BREAK into a receptor and connected to the drainage * food equipment shall be separated from the drainage system by the use of a FULL AIR GAP Air Gap for Drainage shall not be less than 1" or 25 mm Note *Air Gap (Potable) = 25 mm or 1" or twice the diameter of the inlet pipe (min.) *Air Break (Waste) SECTION 802 APPROVAL - shall be approved by the administrative authority SECTION 803 INDIRECT WASTE PIPING - All piping sizes and installations shall be in accordance with this code - No vent from the indirect waste piping shall combined to any vent - Indirect waste pipe exceeding 1.5 m but not less than 4.6 m length shall be TRAPPED, but need not to be vented - Indirect waste pipe less than 4.6 m, pipe size need not to be larger than drain outlet or tailpiece but not less than 13mm in diameter - Angles and Changes of Directions on indirection waste pipe shall be provided Clean outs SECTION 804 INDIRECT WASTE RECEPTORS - Stand pipe receptor for Clothes washer 0.80 m to 0.45 m (above its trap) Traps for stand pipe receptor for clothes washer 0.15 m to 0.45 m (above ground) * an approved type of waste disposal shall be provided * BEE HIVE strainer shall be provided SECTION 805 PRESSURE DRAINAGE CONNECTION - Drains, overflow and relief vents for water supply system shall be provided and no wastes pipes shall not be directly connected to the drainage system SECTION 806 STERILE EQUIPMENT - Shall be drained to an Air Gap SECTION 807 APPLIANCES - Shall be drained to an indirect waste pipes discharging into open receptors - No domestic washing machine shall be directly connected without an approved Dishwasher Air gap fitting on the discharge side SECTION 808 COOLING WATER - Trap connection shall be by means of pipe connected to the inlet side and not less than 152 mm above the overflow rim of the fixture SECTION 809 DRINKING FOUNTAINS - It shall be installed with indirect waste pipes SECTION 810 STEAM and HOT WATER DRAINAGE CONDENSES and SUMPS - No steam pipe or any water having 60 degree celsius shall directly connected to the plumbing or drainage system - All interceptors and tanks shall have a wall of not less than 104 mm thickness and inside shoud have a plastering of not less than 13 mm - Condensers constructed with metal G.I. Gauge # 12 B & S or 2.77 mm thick - Sumps and boilers shall have an access for cleaning and a volume of not less than twice the volume of water removed from the boilers SECTION 811 CHEMICAL WASTES - all chemical wastes shall be pretreated - Pre treatment facilities shall be approved by administrative authority - Material used on piping shall be Chemical Resistant glass lined pipe, High silicon iron lead pipe not less than 32 mm wall thickness - All jointing materials shall be approved - All piping shall be readily accessible - Owner shall keep the location of piping of chemical waste - No chemical vent be connected to other vents - No chemical wastes shall be discharged to the ground SECTION 812 VERTICAL WET PIPING - Wet Venting is limited to Trap arm receiving 1 to 2 Fixture units - Fixture that serves as a Vent shall not exceed up to 4 Fixtures - Vertical piping of two (2) consecutive inlet levels is considered wet vented sec. - Wet vented section shall have a minimum of one (1) pipe size larger than the upper fixture or one (1) pipe size larger than the sum of the fixture unit - Common vent sizing shall be the sum of the fixture unit served SECTION 813 SPECIAL VENTING FOR ISLAND FIXTURES - Traps for island sink shall be vented as high as possible, but not less than the drain board height - Return vent shall be connected to the horizontal drain thru a wye branch - Critical level is 152 mm above the highest flood level rim of the fixture - Vent line slope of not less than 20mm/m or 2% towards the drain - Return bend under drain shall be a one piece fitting or an assembly of 45 degree elbow - Island sink drain shall serve no other fixture - provision of accessible clean outs on vertical portion of the foot vents SECTION 814 COMBINATION WASTE AND VENT SYSTEM - CW and VS shall be provided with a Vent - Any branch more than 4.6 meter shall be separately vented - Minimum area of CW an VS shall be atleast 50% or 1/2 of the drain it served - Vent connection shall be downstream of the uppermost fixture - Waste pipe and each trap shall be equal to two (2) pipe size larger than required - No vertical waste pipe shall be used in any CW and VS except the Tailpiece, and shall not be greater than 0.60 meters in length - CO not required when the tailpiece is less than 51 mm diameter - Provision of accessible CO SECTION 815 DIRECT WASTE TO GROUND - Sacrarium - shall not be disposed directly to the ground length 346 mm width 286 mm height 152 mm SECTION 816 CLEAR WATER WASTES - Water lilts, expansion tanks, cooling sachets, sprinkler systems, drip and overflow fans shall discharge thru an indirect waste by means of an Air gap SECTION 817 SWIMMING POOLS - Pump discharge shall be installed as Indirect waste SECTION 818 REFRIGERATION WASTES - Minimum 1 inlet serving not more than 2.8m3 32 mm refrigeration wastes 4-12m3, 32mm inlets or the equivalent 51mm refrigeration wastes 13-36m3, 32mm inlets or the equivalent 76mm refrigeration wastes SECTION 819 AIR CONDITIONING EQUIPMENT - shall be drain by means of an indirect waste pipe *Point of Discharge **Air Gap or Air Break a. a properly trapped receptor b. other point of discharge acceptable to the administrative authority 1. dry wells 2. Leaching pits 3. Tailpiece of plumbing fixtures VENTS AND VENTING SECTION 901 VENTS REQUIRED - Fixture trap shall be protected against Siphonage and Back pressure - Provision of vent pipes SECTION 902 VENTS NOT REQUIRED - Vent pipe may be omitted when an interceptor acts as a primary settling tank and discharge thru a horizontal indirect waste pipe on a secondary receptor *second receptor shall be properly trapped and vented - Traps serving sinks shall be discharged by an indirect waste pipe SECTION 903 MATERIALS - Materials a. Cast iron b. Ductile cast iron c. Galvanized steel d. Galvanized wrought iron steel e. Lead f. Copper g. Brass h. Schedule 40 i. ABS j. DWV k. Series 1000 l. PVC *no galvanized steel or galvanized wrought iron pipe shall be used underground, and it shall be laid atleast 152 mm above the ground *Changes in direction of vent piping shall be made on approved fitting *no such pipe shall be bent or strained *burred ends shall be reamed Study this The length of horizontal portion of a vent may exceed 1/3 of the Total length of vertical and horizontal portions is limited by Table 7.5, provided the vent is increased one (1) pipe size larger for it's entire length SECTION 904 SIZE OF VENTS - Table 7-5 * The size of Vent piping shall be based on the TOTAL number of FIXTURE UNITS - Drainage shall be vented by one or more vent pipes, shall not be less than the required SECTION 905 VENT PIPE GRADES AND CONNECTIONS - All horizontal vent pipes shall be free from Drops and Sags, shall be graded and connected to the drip by gravity - Vents connected to horizontal drain shall have its invert taken off above the drainage centerline - Vents shall be offsetted horizontally 152 mm above the highest flood level rim - All vent pipe shall extend above the roof, and shoud be increased one (1) pipe size larger (a.k.a. VSTR) - Vent pipe opening of a soil or waste pipe shall not be below the trap weir - Two fixtures may be served by a common vertical vent SECTION 906 VENT TERMINATION - Vent stack thru roof extension *Distance from roof 0.15 m (min.) *Distance from any 0.30 m (min.) vertical surface - Vent opening termination when there is openable access nearby *Vertical distance 0.90 m (min.) *Horizontal distance 3.0 m (min.) - Vent pipe shall be extended 0.15 m from any roof or fire wall - Vent pipes for outdoor installation *horizontal distance from 3.0 m (min.) any part of roof (deck) *vertical distance from 2.1 m (min.) any part of roof (deck) - Joints on vent on the roof shall be made watertight and be protected with approved flashing material SECTION 907 VENT STACKS and RELIEF VENT - For building 10 storeys and higher, Yoke vent is required every 3 to 5 floors - Diameter of an individual vent shall not be less than 1 1/4" or 32 mm or less than 1/2 or 50% of the drain it serve - provision of venting on drainage TRAPS AND INTERCEPTORS SECTION 1001 TRAPS REQUIRED - Each plumbing fixture excreting shall have approved type water seal - ONE TRAP is to ONE TRAP ARM rule Fixtures Trap a. Water closet Integral trap b. Lavatory P-trap c. Shower drain/Floor drain P-trap d. Bath tub Bag trap Note One trap can served not more than 3 single compartment laundry sinks or laundry tubs having same elevation and distances not more than 0.75 m apart - No food waste disposal unit shall be installed on a Restaurant, Commercial or Industrial sinks serve by a single trap *Food waste disposal unit shall connected to a separate trap Note No clotheswasher or laundry tub shall be connected to any trap of a kitchen sink - Tailpiece shall be as short as possible 0.60 meter maximum SECTION 1002 TRAPS PROTECTED BY VENT PIPES - trap vent shall be provided - Trap Arm Length shall not be less than 2x (twice) the diameter of the the trap arm pipe * CO is not require on trap arm change of direction if does not exceed 90 degrees Exception a. Change of direction not exceeding 22.5 degrees no C.O. required b. Change of direction greater than 22.5 degrees CO required * Vent pipe except water closet and urinal shall not be below the weir of the trap Trap Arm Diameter size Distance to vent 32 mm 0.76 m 38 mm 1.07 m 51 mm 1.52 m 76 mm 1.83 m 102 and larger 3.05 m **with a slope of not less than 20mm/m or 2% Note The developed length bet. Closet ring or Closet Flange to the  inner side of the vent shall not be more than 1.8 m (max.) - Traps described Gauge # 17 B&S or 1.1 mm thick can be use as a trap, except fixtures discharging urine *traps shall have the name stamp (gauge tubing and manufacturers name) *traps shall have a smooth and uniform interior waterway SECTION 1004 TRAPS PROHIBITED - Traps Prohibited a. "S" trap b. Bell and Crown Vented traps c. No fixture shall be Double trapped d. No Drum trap shall be isntalled with out vent SECTION 1005 TRAP SEALS - Fixture shall have a Water Seal = 51mm (2") to 102mm (4") deep *measured from the dip to the crown weir SECTION 1006 FLOOR DRAIN TRAPS - Floor drain shall be connected a trap - Drain inlet shall be located that it can be Full viewed - Provision of Backwater valve when subject to reverse flow SECTION 1007 TRAP SEAL PROTECTION - Floor drain or similar traps directly connected to the drainage shall be provided with an Approved Automatic Priming for Water seal maintenance SECTION 1008 INDUSTRIAL INTERCEPTOR / CLARIFIER - Interceptors or clarifiers for san shall have a minimum 152 mm deep water seals - Location of interceptors shall be relfected on plan SECTION 1009 SLAUGHTER HOUSE and PARKING ESTABLISHMENTS - Private sewage disposal system shall be provided with Grease interceptor for proper disposal of EFLLUENTS SECTION 1010 MINIMUM REQUIREMENT FOR AUTO WASH RACK - Wash rack shall be protected against Storm or Surface water * shall drain into an Interceptor for Oil and Grease separation SECTION 1011 GREASE TRAP - Grease trap provision  Note Grease trap is not required for individual units or for any private living quarters - No grease trap is required having a flow rate of 1.3 L/s to 3.4 L/s - Any fixture having grease trap shall have a flow control device Note The total capacity of fixtures discharging into such any grease trap shall not exceed 2 1/2 times the certified liters per minute flow rate of the grease trap - Grease trap installed with inlet more than 1.2 meters lower than any outlet shall have a flow rate of not less than 50% of that given in Table 10.2 or more than 4 fixtures connected to it - Grease trap can be used as an outlet when the distance bet. The outlet and the trap shall not exceed 1.2 meters or the vertical tail pipe should not exceed 0.75 meters - Water seal for grease trap shall not be less than 51 mm or 2" SECTION 1012 GREASE INTERCEPTOR for COMMERCIAL KITCHENS Grease trap capacity, # of Grease Retention Rate of flow (L/min) fixtures connected Capacity 1 76 18 2 95 23 3 132 32 4 189 45 SECTION 1013 FOOD WASTE DISPOSAL PROHIBITED - No food waste disposal unit shall be connected to Grease trap or Grease Interceptor - Vent pipe shall not be below of the weir trap - Developed length of the Closet Flanged or Closet ring to the vent pipe shall not exceed 6' or 1.819 meters Trap Arm Diameter size Distance to vent 32 mm 0.76 m 38 mm 1.07 m 51 mm 1.52 m 76 mm 1.83 m 102 and larger 3.05 m SECTION 1014 TRAPS - Each trap shall be Self Cleaning - Materials a.ABS b. Cast Brass c. Cast Iron  d. Lead e. PVC * Gauge # 17 B&S or 1.1 mm thick *every trap shall have a smooth and uniform waterway Read 1. No more than 1 approved slip joint fitting may be used on the outlet side of a trap 2. No tubing trap shall be installed with out a listed Tubing Trap Adapter SECTION 1015 LAUNDRIES - Laundry equipent that does not have "Integral strainers" shall discharge into an interceptor with a wire basket to prevent passage of 12.7mm or larger in maximum dimension SECTION 1016 SAND INTERCEPTORS where REQUIRED - Provision of Sand interceptor SECTION 1017 CONSTRUCTION and SIZE - Inlet and outlet of the pipe shall have a minimum of 76 mm diameter - The invert of the inlet pipe shall not be lower than the invert of the outlet *Minimum dimension - 0.2 m2 *Minimum depth - 610 mm (under the invert of the outlet pipe) - For every 18.9 L/min or 75.7 L/min additional flow, a 0.09m2 increased in the area of the sand interceptor - Outlet section = atleast 50% of the area of the inlet section STORM DRAINAGE SYSTEM SECTION 1101 GENERAL - Storm Drainage are required for a.Roof Areas b. Courtyard c. Courts * to collect stormwater and discharge the storm water to an approved disposal point SECTION 1102 RAINWATER SYSTEMS - Materials 1. Rain water downspouts - Conductor pipings a. Cast Iron b. Galvanized steel c. Iron, Brass, Copper, Lead d. Schedule 40 ABS e. DWV f. Series 1000 g. PVC DWV 2. Rain water downspout - Conductor a. Not less than Gauge # 26, Galvanized sheet metal * used in low height building 3. Rain water piping a. Galvanized iron pipe b. Schedule 30 c. Cast iron soil pipe d. S.W. e. Type DWV copper tube f. Schedule 40 ABS g. DWV h. Series 1000 i. PVC DWV *used in medium height building, basement area 4. Downspout for High rise buildings -stronger pipe resist "Hydrostatic Pressure" 5. Rainwater piping commencing 0.60 meters from the exterior of the building * approved materials - Connections and Installations a. Rain water piping shall not be used as vent,soil and waste pipe b. Rain water piping shall be protected c. Roof drains, overflow drains, rainwater piping shall be tested - Roof Drains *Materials should be made of Cast iron, Copper or any corrosion resistant material *shall not be less than 102 mm above the surface of the roof **Strainers **Dome type Minimum total net inlet area = 1 1/2 times of the area of the outlet pipe **Roof Deck Strainer can be a Sun deck or Darking decks and shall be a Flat surface type Total net inlet area = not less than 2 times the area of the outlet pipe *Interior roof drain shall be made of cast iron and watertight *Outlet connections shall be inside caulk and female screwed - Sizing of Rain water piping a. Rain fall per hour given the roof area in m2 *Manila Area = 102 mm/ hour (rainfall intensity) b. Vertical wall area adjacent roof area below 1. One wall - add 50% of area of the wall to the roof area 2. Two adjacent walls - add 35% of the total wall areas to the roof area 3. Two opposite walls (same height) - no additional area to be added 4. Two opposite walls (different height) - add 50% of wall area above top of lower wall to the roof area 5. Three sides wall - Add 50% of the inner wall below the top of the lowest wall - plus allowance for the area of the wall above top of the lowest wall 6. Four sides - no allowance for wall areas below the top of the lowest wall - add for areas above top lowest wall 7. The area of the side of a tall building exposed to rain is taken as 1/2 of the cross area HOUSE DRAINS AND HOUSE SEWER SECTION 1201 SEWER REQUIRED - Connection to a Public or Private Excreta Sewerage system - No public sewer -drainage piping shall connect to a private sewage disposal sys. - mandatory connection to an existing public sewer fronting the lots - Public sewer is not available 62 meters from any proposed building - No permit shall be issued for the installation, alteration or repair of any private sewage disposal system - Every lot shall be connected with such Public sewer SECTION 1202 DAMAGE TO PUBLIC SEWER/PRIVATE SEWAGE DISPOSAL SYSTEM - Deposition of any material that could damage the disposal system is unlawful - Rain or surface water shall not be discharged into excreta drainage system - No Cesspool, Septic tank effluents, Seepage pit or Underdrain system shall be connected to the excreta building sewer leading to public sewer main - No food waste grinder shall be connected to disposal system - Approved Type Watertight Sewage *Waste water holding tank SECTION 1203 BUILDING SEWER MATERIALS - Building Sewer beginning 0.60 meters from the outside face of the wall SECTION 1204 MARKINGS - Approved requirements SECTION 1205 SIZE OF THE BUILDING SEWER Table 12-2 - Basis on the total number of fixture units drained by sewer *Minimum Size of Building sewer = 150 mm or 6" SECTION 1206 GRADE, SUPPORT and PROTECTION of BUILDING SEWER - Building Sewers a. Slope 20mm/m or 2% towards 1. Septic tank 2. Street sewer main Except a. Due to the depth of the street sewer b. Due to structural features conflict c. Due to adverse arrangement of any building 20mm/m or 2% smaller than 102 mm pipe 10mm/m or 1% 102 mm to 152.4 mm pipe 5mm/m or 5% 204 mm or larger  b. Shall be laid over Conrete Cradle or Bed c. Shall be laid 0.60 meters from the building wall, or 0.30 meters below the finish surface of the ground SECTION 1207 CLEANOUTS - CO not required for 3.0 meter length of building sewer from building drain Note All required building sewer cleanouts shal be extended to finish grade - CO shall be installed to allow cleaning on the direction of flow, or at right angle - CO under concrete or asphalt shall be made accessible by strong yard boxes with hinged cover or extending the top cover with counter sunk operating nut flush - CO on manhole should be approved by the administrative authority *Maximum distance of Manhole = 91.0 meters - Inlet and outlet pipes connection of manhole shall be made by a Flexible Compression Joints and closer than 0.3 meters - No flexible compression joint shall be embedded inside the manhole base SECTION 1208 SEWER AND WATER PIPES - Bottom of the water pipe at all points shall have atleast 3.0 meters above the top of the drain line - The water pipe shall be placed on a solid shelf with horizontal clear distance atleast 3.0 meters - Water pipe crossing sewer line shall be laid 3.0 meters above the sewer or drain line - Water pipe joints shall have a clear distance of 3.0 meters to any sewer line SECTION 1209 LOCATIONS SECTION 1210 ABANDONED SEWERS AND SEWAGE DISPOSAL FACILITIES - Every abandoned sewer line shall be Plugged or Capped 1.50 meters from the property line - All abandoned sewerage compartments shall have the sewage removed and completely filled with Earth, Sand , Gravel, Concrete or approved materials JOINTS AND CONNECTIONS SECTION 1301 TIGHTNESS - Water Test section shall be tested with 3 meter head of water, and will be kept within 15 minutes - Air Test Uniform pressure gauge of 34.5 kpa or 254 mm of mercury, and will be kept for a period of 15 minutes - Building Sewer test Plugging the ends of the building sewer and completely filling it with with water from lowest to the highest - Water piping a. Water test testing pressure shall be the Working pressure plus 50% load b. Air Test 344.5 kpa of air can be substituted for water test SECTION 1302 TYPE OF JOINTS - Types 1. Caulked joints *Bell and Spigot cast iron pipe *shall be firmly packed wih oakum or hemp and filled with lead to a depth of not less than 25.4 mm or 1" *the finish joint shall not extend to 3.2 mm below the rim of the hub for Cast iron pipe * Compression joint - using neoprene gasket rubber *Hubless joint - using elastomeric sealing sleeve and stainless steel clamp 2. Threaded Joints *used for Galvanized iron, steel and plastic pipes *shall be of standard taper pipe thread * threaded plastic = schedule 80 minimum wall thickness and shall be factory cut or molded * pipe joint material shall be applied on male thread *always used recessed fittings 3. Wired joints * use for lead pipe and fittings, copper or brass pipe, ferrules, solders nipples and traps should not be less than 19mm or atleast same as thick as the materials joined Note Joints between Lead and Cast iron, Steel or Wrought iron shall be by means of CAULKING FERRULE or SOLDERED NIPPLE 4. Soldered and Wet joints * flame torch @ 149 to 427 degrees celsius *use in brass or copper tubings * shall be properly flux of an approved material * Solder and Flux with 0.2% lead is prohibited -Brazing Joint *similar to soldering, except flame torch starts at 449 degrees C up to the melting point of the material joined -Welding *joining metal in the plastic molten state 5 Compression Fittings a. Standard fittings - fires a ferrule against the tube b. Flare fittings - used for copper tubings -tubing expanded with a flaring tool 6. Cement Mortart Joints *used for Concrete pipes *it is prohibited on new construction, and only allowable for repair and connection to the existing lines * using compression elastomeric materials -Elastomeric Gasket Joint * "O-RING" 7. Burned Lead joints *used for lead pipes * weld shall be as thick as the lead pipe joined 8. Asbestos Cement Sewer pipe * using of coupling and sealed with neoprene rubber rings 9. Packing Additives prohibited * used of leaking sealing additives is prohibited 10. Flexible Compression Factory Fabricated joints * aprroved standards 11. Solvent Cement Plastic Joints * fusing plastic and fittings using Adhesive * IAPMO standard installation approved 12. Mechanical Joints *shall be approved on joining centrifugal cast iron  13. Molded Rubber Coupling Joints * Neoprene rubber bushing shall be used to allow any difference in piping material diameters *Neoprene rubber shall be used on pipes subject to oil 14. Elastomeric Gasketed Joints and Rubber ring joints * IAPMO Standard 15. Brazing and Welding 16. Pressure Lock type Connection * inserting the pipe to a certain depth 17. Shielded Coupling joints 18. Hubless Cast iron pipe joints SECTION 1303 USE OF JOINTS - Clay Sewer pipe * Neoprene gasket for hub and spigot joints - Cast Iron pipe - Screwed pipe to cast iron pipe * either caulked or threaded joints - Lead to Cast iron,wrought iron or steel * shall be made by a wired joints to caulking ferrule, soldered nipple or bushing - Copper Water Tube * brass fittings properly soldered and brazed - Plastic Fittings * use of fabricated female screw is prohibited * minimum of schedule 80 wall thickness SECTION 1304 SPECIAL JOINTS - Copper tubing to Screw pipe joints * used of brass adaptor fittings and shall be properly sweated or soldered - Slip Joints * used of compression nut, compression washer and friction ring - Expansion joints * joints shall be free and accessible - Unions - Ground joint, flared or ferrule connections * shall not be considered slip joints - Plastic pipe connections to other materials * used of approved types of fittings and adapters SECTION 1305 FLANGED FIXTURE CONNECTIONS - Connection shall be bolted with rust proofed materials and with an approved gasket, washer or setting compound bet. The earthware and the connection - shall be set at firm base - Closet bends or stubs must be cut off square - Gasket material shall be Grpahite impegnated asbestos felt SECTION 1306 PROHIBITED JOINTS AND CONNECTIONS - Obstruction of flow thru the drain is prohibited - The enlargement of a closet bend or stub from 76mm to 102 mm is not an Obstruction QUALITY AND WEIGHTS OF MATERIALS, PLUMBING MATERIALS AND REFERENCE STANDARD MINIMUM STANDARDS - shall be labelled and listed - markings shall be done in the factory not in the field *Iron pipe Size a. Iron c. Brass b. Steel d. Copper pipes * Used of copper tubings a. Shall not be carrying chemical and acid wastes b. Copper tube for water shall have a weight of not less than type "L" c. Coloured stripes for marking shall be at least 6.4mm widht **Types "K" green "L" blue "M" red "DWV" yellow *Lead a. For Safe Pans = not less than 19.56 kg/m3 and 1.6 mm thick b. For Flashings or Vent terminals = not less than 14.63 kg/m3 and 1.2 mm thick c. Lead bends and traps shall not be less than 3.2mm in wall thickness * Ferrules and Bushings a.Caulking ferrule shall not be of red cast brass, Bronze or copper b. Soldering nipples and bushings shall not be of brass, copper or heavy cast red brass * Closet rings (Closet Flanges) a. Shall be 178 mm diameter and have a 38 mm wide flange b. Caulked on closet rings shall not be less than 6.4 mm thick and not less than 51 mm in depth c. Minimum of 4 bolts per water closet *Clean out fittings a. Plug should have a raised square head when installed along travel ways b. It should be gas and water tight * Threaded Pipe and fittings 1. Screwed Fittings - ABS or PVC threads shall be tapped 2. Drainage fittings - should allow 2% slope * Backwater Valve * shall remain sufficiently open during low periods of flows * Valves and Fittings a. Gate valve in drainage shall be on full way type Size Materials 102 mm or larger Cast iron bodies less than 102 mm Cast brass or bronze bodies * Zinc Alloy Componets * shall be approved to the standards and listings