Untitled Quiz

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Questions and Answers

What is the required depth for the water seal in a fixture?

10mm to 20mm

51mm to 102mm (correct)

100mm to 150mm

25mm to 50mm

Which statement accurately describes the connection requirements for floor drains?

All floor drains will have a built-in greasetrap.

Floor drains do not require any special valves.

Floor drains must be connected to a trap and visible for inspection. (correct)

A floor drain may be installed without a trap.

What is the minimum water seal depth required for interceptors or clarifiers for sanitary waste?

75mm

51mm

152mm (correct)

102mm

Under what conditions is a grease trap not required?

For any fixture discharging under 1.3 L/s. Signup and view all the answers

What is the maximum flow rate allowed for fixtures discharging into a grease trap?

2.5 times the certified flow rate of the grease trap Signup and view all the answers

What is the required slope for horizontal drainage piping that is less than 102 mm in diameter?

20 mm per meter or 2% Signup and view all the answers

What is considered a prohibited practice when connecting or using drainage systems?

Connecting a vent pipe as a soil pipe Signup and view all the answers

What fittings are prohibited in venting systems according to the regulations?

Double Hub Fitting Signup and view all the answers

What must all plumbing fixtures be connected to?

Drainage system Signup and view all the answers

What is the minimum distance a septic tank must be from a public sewer when the sewer is not available?

62 meters Signup and view all the answers

What is the maximum number of single compartment laundry sinks or tubs that a single trap can serve?

3 Signup and view all the answers

Which direction change requires a 45-degree wye branch?

Horizontal to Horizontal Signup and view all the answers

Which type of trap is explicitly prohibited according to the regulations?

S trap Signup and view all the answers

What condition must be avoided in the installation of pipings, as per the general regulations?

Cracks or holes in piping Signup and view all the answers

What is the maximum allowable length for a tailpiece connected to a laundry tub?

0.60 meter Signup and view all the answers

What protection is required for pipes subjected to corrosion?

Polyethylene sheath Signup and view all the answers

Which condition requires a change of direction (C.O.) for the trap arm?

Change exceeding 22.5 degrees Signup and view all the answers

Which fitting is NOT allowed for making waste connections?

Double tee branch Signup and view all the answers

What should be done with openings in drainage and vent systems when necessary repairs are made?

Capped or plugged permanently Signup and view all the answers

What is the required slope for the trap arm pipe?

2% Signup and view all the answers

What is the maximum distance to vent for a 51 mm diameter trap arm?

1.52 m Signup and view all the answers

Which component is not required on a trap arm that changes direction not exceeding 90 degrees?

Cleanout Signup and view all the answers

What material thickness is acceptable for a trap described in the regulations?

1.1 mm Signup and view all the answers

Which type of valve is permitted for flushing one urinal only?

Manually controlled flushometer valve Signup and view all the answers

What is the minimum width required for the dam or threshold in shower receptors?

559 mm Signup and view all the answers

What is the required minimum area for shower compartments?

0.6 m² Signup and view all the answers

What is the maximum temperature allowed for hot water?

48.48 degrees Celsius Signup and view all the answers

What is the maximum spacing allowed between drains in gutters of public showers?

4.9 meters Signup and view all the answers

What material is commonly required for shower receptors?

Vitrified China Signup and view all the answers

What must be done before a plumbing system is covered?

Approval must be obtained from administrative authority. Signup and view all the answers

What is the required height for a shower compartment?

1.78 meters Signup and view all the answers

What should be done if corrections are needed after an inspection?

The permit holder must submit another test for inspection. Signup and view all the answers

Which type of linings' thickness for copper pans is specified?

Gauge #24 B&S Signup and view all the answers

What is the minimum wall thickness for lead bends and traps?

3.2 mm Signup and view all the answers

Which marking color corresponds to copper water tube type 'L'?

Blue Signup and view all the answers

What is the required minimum diameter for closet rings?

178 mm Signup and view all the answers

Which materials should not be used for caulking ferrules?

Brass Signup and view all the answers

What is the minimum required weight for copper tubes carrying water?

Type 'L' Signup and view all the answers

What is prohibited when it comes to the flow through drains?

Obstruction of flow Signup and view all the answers

Which feature should clean out fittings have?

Raised square head Signup and view all the answers

What is a required feature of a backwater valve?

Must remain sufficiently open during low periods of flow Signup and view all the answers

Study Notes

Waste Water Disposal

Waste disposal on any place is prohibited

Drainage Piping Slope

Slope: 20mm per meter or 2% for pipes less than 102mm in diameter
Exceptions: Excessive depth, terrain features, building arrangements
Slope: 10mm per meter or 1% for pipes 102mm or larger

Change of Direction

Horizontal to Vertical: Wye combination, Double sanitary tee, Sanitary tee, Combination wye and 1/8 bend
Horizontal to Horizontal: 45 degree wye branch, Combination wye and 1/8 branch
Vertical to Horizontal: 45 degree branches (long sweep or offset), Combination wye and 1/8 branch

Piping Connections

All plumbing fixtures must be connected to the drainage system

Sewer Connections

Mandatory building sewer connection to public sewer
Septic tank required when public sewer is not available (minimum distance of 62 meters from the public sewer)

Damage to Drainage or Sewer System

Deposits that could damage the system are prohibited
Rain water for storm sewer
Soil and waste pipe for public or sanitary sewer
Septic tank for houses (watertight)
STP (Sewage Treatment Plant) for condominiums

Industrial Waste

Industrial waste must be treated and cannot be discharged into the ground or waterways

Plumbing System Location

Plumbing systems must be located only on the lot of the building they serve

Improper Location

Interference with normal operation is prohibited

Workmanship

Accepted engineering practices must be followed
Cracks, holes, and imperfections must not be concealed
Ends of pipes and tubings must be reamed

Prohibited Fittings and Practices

Prohibited fittings: Double hub fitting, single or double tee branch, single or double tapped tee branch, side inlet quarter bend, running thread, band or saddle
Jointing: Neoprene gasket for hubless pipes
Drainage and Venting: No drainage or vent can be drilled and tapped
Cast Iron Soil Pipe: No cast iron soil pipe can be threaded
Waste Connections: No waste connection can be made to a closet bend or stub of a water closet
Vent Pipe Usage: No vent pipe can be used as a soil or waste pipe, and vice versa
Drainage and Venting System: No single drainage and venting system can be installed without a vent
Piping Connections: No piping connections that impede the flow of air, water, and sewage. Enlarging a closet bend or stub is not considered obstruction
Gate and Check Valves: Must have an accessible connection
Valves and Fittings: Must be installed with consideration for the direction of flow

Independent System

An independent connection must be provided for a private or public sewer

Repairs and Alterations

The owner must notify the administrator when changes are required to conform
All openings in drainage and vent systems must be permanently capped or plugged

Piping Protection

Piping must be protected from breakage (embedded metal pipe sleeves)
Piping must be protected from external corrosion (polyethylene sheath)
Void between pipe and sleeves must be sealed with bitumen
No pipe can be directly embedded in concrete or masonry
No structural member can be weakened
Trenches deeper than footing and parallel to it must be at 45 degrees
Building sewer installation must be between 0.3 meters and 0.6 meters below the finish ground surface
Pipe protection subject to corrosion, erosion, or mechanical damage must have inside lining, outside coating, proper bedding, and top shielding with concrete blocks

Hangers and Supports

Supports must be installed for vertical piping to prevent backflow

Urinals

Automatic Flashing Tanks: For flashing more than one urinal
Flushometer Valves: Manually controlled flushometer valves are used for flashing only one urinal

Floor Drains and Shower Stalls

Floor drain: A plumbing fixture
Shower Receptor: Made of vitrified china, earthenware, ceramic tile, or porcelain-enameled metal
Shower Receptor Dam, Curb, or Threshold: 25.4 mm (1") lower than the outside floor
Dam or Threshold Depth: 51 mm to 228 mm (2" to 9")
Dam or Threshold Slope: 2% to 4%
Dam or Threshold Width: Minimum of 559 mm for a door
Distance from Door to Drain Opening: Minimum 1.2 meters
Shower Compartment Area: Minimum 0.6 m2
Shower Compartment Encompassing Circle: 762 mm diameter
Shower Compartment Height: Minimum 1.78 meters
Public Room Floors: Non-skid surface
Gutters in Public or Gang Showers: Pounded corners and a 2% slope towards the drain
Drain Spacing in Gutters: Maximum 4.9 meters
Maximum Hot Water Temperature: 48.48 degrees Celsius
Lead and Copper Sub-pan Linings: 6kg of asphalt felt, unit weight not less than 19.6 kg/m3, copper pans must be gauge gauge #24 B&S or 0.5 mm thick
Joints: Lead pans are burned, copper pans are soldered or brazed

Plumbing Fixture Requirements

Must be prescribed by the National Building Code

Whirlpool Bathtub Requirements

Removable panel for access to the pump
Circulation pump location above the crown weir
Self-draining pump and circulation piping
Approved suction fitting

Inspection and Testing

Conducted in accordance with approved plans and specifications
Three-day advance notice required before inspection
Permit holder responsible for testing needs
Retesting required after corrections
Test conducted in the presence of the administrative authority
Corrections written by the administrative authority and given to the permit holder
Certificate of approval issued after completion and final test
No system can be covered before approval
All covered plumbing must be uncovered before inspection and testing

Testing Methods

Air or water used for testing
Water Test: Entire system filled with water to overflowing; section system tested with a 3-meter head of water for at least 15 minutes. System must be tight at all joints
Bag Trap: One trap can serve no more than three single compartment laundry sinks or tubs with the same elevation and distance not exceeding 0.75 meters apart
Food Waste Disposal Units: No food waste disposal unit can be installed in a restaurant, commercial, or industrial sink served by a single trap. They must be connected to a separate trap
Clotheswasher and Laundry Tub Connections: Cannot be connected to any trap of a kitchen sink
Tailpiece Length: Maximum 0.60 meters

Traps Protected by Vent Pipes

Trap vents must be provided
Trap Arm Length: Not less than twice the diameter of the trap arm pipe
CO (Change of Direction): Not required for trap arm changes of direction not exceeding 90 degrees
Exceptions: 22.5-degree change of direction does not require CO; more than 22.5-degree change of direction requires CO
Vent Pipe: Except for water closets and urinals, vent pipes should not be below the weir of the trap
Trap Arm Diameter and Distance to Vent:
- 32 mm: 0.76m
- 38 mm: 1.07m
- 51 mm: 1.52m
- 76 mm: 1.83m
- 102 mm and larger: 3.05m
Trap Arm Slope: Not less than 20mm/m or 2%
Developed Length Between Closet Ring or Flange and Vent: Not more than 1.8 meters
Traps: Gauge # 17 B&S or 1.1 mm thick can be used as a trap, except for fixtures discharging urine. Traps must be stamped with gauge tubing and manufacturer's name and have a smooth and uniform interior waterway

Prohibited Traps

"S" trap
Bell and crown vented traps
Double trapped fixtures
Drum traps without a vent

Trap Seals

Fixtures must have a water seal of 51 mm (2") to 102 mm (4") deep, measured from the dip to the crown weir

Floor Drain Traps

Must be connected to a trap
Drain inlet must be fully visible
Backwater valve must be provided when subject to reverse flow

Trap Seal Protection

Floor drains or similar traps directly connected to the drainage must have an approved automatic priming for water seal maintenance

Industrial Interceptor/Clarifier

Must have a minimum of 152 mm deep water seal
Location of interceptors must be reflected in the plan

Slaughterhouses and Parking Establishments

Private sewage disposal systems must have a grease interceptor

Auto Wash Rack Minimum Requirements

Must be protected against storm or surface water
Must drain into an interceptor for oil and grease separation

Grease Trap Provisions

Not required for individual units or private living quarters
Not required for flows of 1.3 L/s to 3.4 L/s
Fixtures with grease traps must have a flow control device
Total capacity of fixtures discharging into a grease trap must not exceed 2.5 times the certified liters per minute flow rate of the grease trap
Grease trap inlet more than 1.2 meters lower than any outlet must have a flow rate of at least 50% of that given in Table 10.2 or more than four fixtures connected to it
Grease trap can be used as an outlet when the distance between the earthware and the connection is less than 1.2 meters
Grease trap must be set on a firm base
Closet bends or stubs must be cut off square
Gasket material must be graphite impregnated asbestos felt
Obstruction of flow through the drain is prohibited
Enlarging a closet bend or stub from 76 mm to 102 mm is not an obstruction

Quality and Weights of Materials

Materials must be labeled and listed
Markings must be done in the factory, not in the field

Iron Pipe Sizes

Iron, steel, brass, and copper pipes
Copper tubing:
- Cannot carry chemical or acid wastes
- Must have a weight at least type "L"
- Colored stripes for marking must be at least 6.4 mm wide
- Types: "K" (green), "L" (blue), "M" (red), "DWV" (yellow)