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What is backpressure backflow?
Backpressure backflow occurs due to an increased reverse pressure above the supply pressure.
What is a backflow preventer?
Back-siphonage is the flowing back of clean water into a plumbing fixture.
False
A bathroom is a room equipped with a shower stall or __________.
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Match the following pipe connections with their descriptions:
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What type of materials are recommended for valves up to and including 51 mm in size?
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What type of gate valve should be installed on the discharge side of each water meter?
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A valve used to control two or more openings shall be a ______ gate valve.
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Indirect waste piping should have a vent extending separately to the outside air.
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Match the following materials with suitable use: 1) Concrete walls and bottom 2) Metal condensers 3) Bituminous coating
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What should be done when deviations from the plumbing Code are necessary in existing buildings?
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Existing building sewer and building drain can be used for new plumbing works without any examination or testing.
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How should pipes passing under or through walls be protected from breakage?
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The bottom of all pipe trenches deeper than the footing of any adjacent building must be at least forty-five (__) degrees therefrom.
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Match the material with its correct piping support interval:
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According to the Revised Plumbing Code of the Philippines, who is required to enlist the professional services of a Registered and Licensed Master Plumber?
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What is the provision under Section 102.1.1 of the Code regarding the description of plumbing work for a permit application?
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A plumbing permit issued under the Plumbing Code will never expire.
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An __________ is a physical separation that prevents backflow into the indirect waste receptor.
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Match the following plumbing terms with their definitions:
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What type of materials should waste pipes for acid or corrosive chemicals be constructed of?
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Chemical wastes can be discharged into the ground without approval.
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What materials can be used for water pressure pipes?
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The vertical piping between two consecutive inlet levels in wet venting shall be considered a _____-vented section.
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Match the following with the correct requirement: 1) Air-conditioning condensate waste pipes should connect indirectly to the drainage system through an airgap or airbreak.
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Backflow preventers should not be located in areas containing toxic fumes.
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Why must traps be made of smooth, self-cleaning materials?
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What is the minimum airgap required to provide backflow protection according to the code?
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No installation of potable water supply piping shall allow entrance of unclean or polluted water due to back-siphonage or ______.
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Match the backflow prevention assembly with its description:
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What type of gaskets are recommended for oil handling piping works?
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How are connections made in Pressure-Lock Type Connection?
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Shielded Coupling Joints are considered as slip joints. True or False?
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Joints in vitrified clay pipe or between such pipe and metal pipe shall be joined with ______ gasket for hub and spigot joints.
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What materials are sand interceptors required to be constructed from?
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Which materials can rainwater downspouts be made of when located on the exterior side of a low height building?
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Roof drains shall be equipped with strainers extending not less than 102 mm above the surface of the roof.
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Vertical rainwater piping shall be sized based upon maximum depth of ___________ or rainfall per hour falling upon a given roof area in square meter.
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Match the following: (Multiple Matches Possible) A. House Drains and House Sewers B. Storm Drainage System C. Building Sewer Materials
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What slope should building sewers be run at towards the point of disposal?
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Building sewer piping should be laid on a firm bed throughout its entire length. (True/False)
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What is the minimum distance from the outer face of any building foundation or wall that materials other than approved for use underground should not be installed?
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Cleanouts shall be placed inside the building near the connection between the building drain and the building sewer, or installed outside the building at the lower end of the building drain and extended to ________.
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Match the following types of joints with their descriptions:
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Study Notes
UNIT 3: Revised Plumbing Code of the Philippines
CHAPTER 1: Administration
- Section 100: Permit Required
- A Registered and Licensed Master Plumber must be enlisted to ensure compliance with the code.
- No plumbing or drainage work can be done without a permit from the Office of the Building Official.
- Section 101: To Whom Permits May Be Issued
- Permits can only be issued to a Registered and Licensed Master Plumber with a valid certificate of registration.
- Section 102: Application of Permit
- The Registered and Licensed Master Plumber must file an application on behalf of the building owner.
- The application must include:
- Description of the plumbing work to be done.
- Legal description of the land.
- Indication of the use or occupancy of the building.
- Plans, drawings, diagrams, and technical specifications.
- Other required data and information.
CHAPTER 2: Definitions
- Definitions of key terms used in the code, including:
- ABS (Acrylonitrile-Butadiene-Styrene)
- Alley
- Alter or Alteration
- Accessible
- Airbreak
- Air Gap
- Approved
- Approved Testing Agency
- Authority, Administrative
- Backflow
- Backflow Connection
- Backflow Preventer
- Back-siphonage
- Backwater Valve
- Ball Cock
- Backvent Pipe
- Ball Joint
- Bathroom
- Battery of Fixtures
- Bell or Hub
- Caustic
- Caulking
- Catch Basin
- Certified Backflow Assembly Tester
- Cesspool
- Chase
- Check Valve
- Circuit Vent
- Code
- Combination Waste and Vent System
- Combustible Construction
- Dead-End
- Department Having Jurisdiction
- Developed Length
- Diameter
- Domestic Sewage
- Double-Bend Fitting
- Double Offset
- Effective Opening
- Existing Work
CHAPTER 3: General Regulations
- Section 301: Disposal of Wastewaters
- It is unlawful to dispose of sewage or wastewater in any place or manner except through an approved excreta and storm drainage system.
- Section 302: Grade of Horizontal Drainage Piping
- Horizontal drainage pipes must be run at a uniform slope of not less than 20 mm/m or 2% toward the point of disposal.
- Pipes with a diameter of 102 mm or larger may have a slope of 10 mm/m or 1% if approved by the Administrative Authority.
- Section 303: Changes in Direction of Drainage Flow
- Changes in direction of drainage piping must be made using approved pipe fittings.
- Fittings with angles of 22.5°, 45°, or 60° may be used.
- No fitting with more than one inlet at the same level may be used unless constructed to prevent discharge from one inlet entering into the other inlet.
- Section 304: Connections to Plumbing System Required
- All plumbing fixtures, drains, appurtenances, and appliances must be connected to the drainage system of the building and premises.
- Section 305: Sewer Required
- Every building with plumbing fixtures must have a sewer service connection to a public or private sewer system, except as provided in Subsection 305.2.### Private Sewage Disposal Systems
- When a public or private sewer is not available, excreta drainage piping from buildings and premises must be connected to an approved Private Sewage Disposal System.
Damage to Drainage Systems and Public Sewers
- It is unlawful to deposit any harmful substances, such as ashes, cinders, solids, rags, flammable, poisonous, or explosive liquids or gases, into plumbing fixtures, floor drains, or devices connected to excreta and storm drainage systems, public sewer, private sewer, septic tank, or cesspool.
- Roofs, inner courts, vent shafts, light wells, or similar areas with rainwater drains must discharge outside of the building or to the gutter, and not be connected to the soil and waste pipe systems.
Industrial Wastes
- Wastes detrimental to the public sewer system or sewage treatment plant must be treated and disposed of as found necessary and directed by the Administrative Authority or other authorities having jurisdiction.
- Sewage or other waste from a plumbing system that may be deleterious to surface or subsurface waters must not be discharged into the ground or into any waterway unless first rendered innocuous through acceptable treatment.
Location of Plumbing Systems
- Excreta plumbing systems, storm drainage systems, building drains, building sewers, private sewage disposal systems, or parts thereof must not be located in any lot other than the lot where the site of the building, structure, or premises are served by such facilities.
- No subdivision, sale, or transfer of ownership of existing property shall be made in such a manner that the area, clearance, and access requirements of the Code are decreased or impaired.
Improper Location of Piping and Fixtures
- Piping, fixtures, or equipment must not be located in a way that interferes with the normal function or use thereof, or with the normal operation and use of windows, doors, or other required facilities.
Prohibited Fittings and Practices
- Certain types of drainage fittings and practices, such as double hub fittings, single or double tapped tee branches, and running threads, are prohibited, except for specific approved uses.
- No drainage or vent piping shall be drilled and tapped for making connections, and no cast iron soil pipe shall be threaded.
- Waste connections must not be made to a closet bend or stub of a water closet or similar fixtures.
- Vent pipes must not be used as soil or waste pipes, nor shall any soil or waste pipe be used as a vent.
Independent Systems
- The drainage system of each new building and of new work installed in any existing building must be separate and independent from that of any other building.
- When available, every building must have an independent connection with a private or public sewer.
Repairs and Alterations
- Deviations from the provisions of the Code are permitted in existing buildings or premises where plumbing installations are to be altered, repaired, or renovated, provided such deviations are necessary and approved by the Administrative Authority.
- Existing building sewer and building drain may be used in connection with a new building or new plumbing and drainage works only when they are found to conform to the requirements governing new work.
Protection of Piping, Materials, and Structures
- All pipes passing under or through walls must be protected from breakage with embedded metal pipe sleeves.
- All pipes in connection with the plumbing system must be installed so that the piping or connections will not be exposed to undue strains or stresses.
- Provisions must be made for pipe expansions and contractions, and bending due to structural settlement.
Trenching, Excavation, and Backfill
- Tunneling and driving may be done in yards, courts, or driveways of any building site.
- All excavations must be completely back-filled as soon as possible after inspection.
Plumbing Fixtures
- Plumbing fixtures must be manufactured of dense, durable, non-absorbent materials and have smooth, impervious surfaces.
- Fixtures must be equipped with approved strainers and have connections that prevent backflow.
- Certain types of fixtures, such as water closets and urinals, have specific requirements for installation and operation.
Installation of Fixtures
- Fixtures must be installed in a manner that provides easy access for repair and cleaning.
- Joints between fixtures and walls or floors must be made watertight.
- Fixtures must be secured to the floor or wall and installed level and in proper alignment.
Inspection and Test
- All new plumbing work and affected existing systems must be inspected by the Administrative Authority to ensure compliance with the Code.
- The permit holder must notify the Administrative Authority when work is ready for inspection.
- Tests must be conducted in the presence of the Administrative Authority or their representative.
Maintenance
- The owner or agent must maintain the plumbing and drainage system of their premises in a sanitary and safe operating condition.
Existing Construction
- No provision of the Code requires a change in any portion of a plumbing or drainage system or other work regulated by the Code in or on existing buildings or lots, unless the system is determined to be dangerous, unsafe, insanitary, or a nuisance.
Health and Safety
- When compliance with the Code fails to eliminate or alleviate a nuisance or health hazard, the owner or agent must install additional plumbing and drainage facilities or make repairs or alterations as ordered by the plumbing authority.Here are the study notes for the text:
Backflow Prevention and Cross-Connection Control
- No plumbing fixture, device, or construction shall be installed or connected to a domestic water supply if it may pollute the water supply or create a cross-connection between the potable water distributing system and contaminated water.
- An indirect connection or a backflow prevention device is required to prevent contamination.
Water Piping and Fittings
- Water pressure pipes shall be of copper, centrifugal cast iron, galvanized wrought iron, galvanized steel, or other approved materials.
- Cast iron fittings up to and including 51 mm in size shall be galvanized.
- Small-sized malleable iron water fittings shall be galvanized.
- Previously used piping and tubings shall not be reused for potable water systems.
Valves
- Valves up to and including 51 mm in size shall be brass or other approved materials.
- A fullway gate valve shall be installed on the discharge side of each water meter and each unmetered water supply.
- Control gate valves shall be installed before each water-supplied appliance slip joint and supply pipings for non-metallic fixtures and appliances.
Gravity Supply Tanks
- Elevated or gravity storage tanks for potable water supply shall be tightly covered to prevent unauthorized access and contamination.
- Potable water inlets to gravity tanks shall be controlled by a float valve, float switch, or electrode-type water level control to prevent overflowing.
Indirect Waste Piping and Receptors
- No plumbing fixtures served by indirect waste pipes shall be installed until approved by the Administrative Authority.
- Indirect waste pipes shall be sized and installed in accordance with the Code applicable to drainage and vent piping.
- No vent from indirect waste piping shall combine with any excreta connected vent, but shall extend separately to the outside air.
- Indirect waste pipes exceeding 1.5 meters but less than 4.6 meters in length shall be directly trapped, but such traps need not be vented.
Appliances and Devices
- Appliances, devices, equipment, or other apparatus not regularly classified as plumbing fixtures equipped with pumps, drips, or drainage outlets may be drained by indirect waste pipes discharging into an approved-type open receptor.
- No domestic dishwashing machine shall be directly connected to a drainage system of food waste disposer without the use of an approved dishwasher airgap fitting on the discharge side of the dishwashing machine.
Cooling Water and Drinking Fountains
- Clean running water used exclusively as a cooling medium in an appliance, device, or apparatus may discharge into the drainage system through the inlet side of a fixture trap.
- Drinking fountains may be installed with indirect wastes.
Steam and Hot Water Drainage, Condensers, and Sumps
- No steam pipe shall be directly connected to any part of a plumbing or drainage system, nor shall any water having a temperature above 60°C be discharged under pressure directly into any part of a drainage system.
- Pipes from boilers shall discharge by means of indirect waste piping.
- Sumps, condensers, or intercepting tanks shall be constructed of concrete or metal and shall be provided with suitable means of access for cleaning and shall contain a volume of not less than twice the volume of water removed from the boiler or boilers connected thereto.
Chemical Waste
- Chemical or industrial liquid wastes likely to damage the excreta sewer system, detrimentally affect sewage treatment, or contaminate surface or subsurface waters shall be pretreated to render them innocuous prior to their discharge into a drainage system.
- Detailed plans and specifications of pretreatment facilities shall be required by the Administrative Authority.
- Piping conveying industrial, chemical, or process wastes shall be of such material and design to adequately perform its intended function to the satisfaction of the Administrative Authority.
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Description
This quiz covers the administration section of the revised plumbing code of the Philippines, including permit requirements. It's designed for plumbing professionals and students.
