Basic Principles Of The 1999 National Plumbing Code Of The Philippines

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Principle 1

Back 1

All premises intended for human habitation, occupancy or use shallbe provided with a supply of pure and wholesome water, neither connected withunsafe water supplies nor subject to hazards of backflow or back-siphonage.

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Principle 2

Back 2

Plumbing fixtures, devices and appurtenances shall be supplied with water in sufficient volume and at pressure adequate to enable them to function satisfactorily and without undue noise under all normal conditions of use.

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Principle 3

Back 3

Plumbing shall be designed and adjusted to use the minimumquantity of water consistent with proper performance and cleaning.

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Principle 4

Back 4

Devices for heating and storing water shall be so designed andinstalled as to prevent dangers from explosion through overheating.

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Principle 5

Back 5

Every building having plumbing fixtures installed and intended forhuman habitation, occupancy or usc on premises abutting on a street, alley oreasement where there is a public sewer, shall be connected to the sewer system.

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Principle 6

Back 6

Each frunily dwelling unit on premises abutting on a sewer or witha private sewage-disposal system shall have at least one water closet and one kitchentypesink. Further, a lavatory and bathtub or shower shall be installed to meet thebasic requirements of sanitation and personal hygiene.

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Principle 7

Back 7

Plumbing fixtures shall be made of smooth non·absorbent material,free from concealed fouling surfaces and shall be located in ventilated enclosures.

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Principle 8

Back 8

The drainage system shall be designed, constructed and maintainedto safeguard against fouling, deposit of solids, clogging and with adequate cleanoutsso arranged that the pipes may be readily cleaned.

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Principle 9

Back 9

All pipings of plumbing systems shall be of durable NAMPAP APPROVEDmaterials, free form defective workmanship, designed and constructedby Registered Master Plumbers to ensure satisfactory service.

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Principle 10

Back 10

Each fixture directly connected to the drainage system shall beequipped with a water-sealed trap.

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Principle 11

Back 11

The drainage piping system shall be designed to provide adequatecirculation of air free from siphonage, aspiration or forcing of trap seals underordinary use.

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Principle 12

Back 12

Vent terminals shall extend to the outer air and installed to preemptclogging and the return of foul air to the building.

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Principle 13

Back 13

Plumbing systems shall be subjected to such tests to effectivelydisclose all leaks and defects in the workmanship.

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Principle 14

Back 14

No substance which will clog the pipes, produce explosivemixture, destroy the pipes or their joints or interfere unduly with the sewage-disposalprocess shall be allowed to enter the building drainage system.

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Principle 15

Back 15

Proper protection shall be provided to prevent contamination offood, water, sterile goods and similar materials by backflow of sewage. Whennecessary, the fixture, device or appliance shall be connected indirectly with thebuilding drainage system.

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Principle 16

Back 16

No water closet shall be located in a room or compartment whichis not properly lighted and ventilated.

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Principle 17

Back 17

If water closets or other plumbing fixtures are installed in buildingswhere there is no sewer within a reasonable distance, suitable provision shall be madefor disposing of the building sewage by some accepted method of sewage treatmentand disposal, such as a septic tank.

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Principle 18

Back 18

Where a plumbing drainage system may be subject tb backflow ofsewage, suitable provision shall be made to prevent its overflow in the building.

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Principle 19

Back 19

Plumbing systems shall be maintained in serviceable condition byRegistered Master Plumbers.

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Principle 20

Back 20

All plumbing fixtures shall be installed properly spaced, to beaccessible for their intended use.

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Principle 21

Back 21

Plumbing shall be installed by Registered Master Plumbers withdue regard to the preservation of the strength of structural members and theprevention of damage to walls and other surfaces through fixture usage.

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Principle 22

Back 22

Sewage or other waste from a plumbing system which may bedeleterious to surface or sub-sutface waters shall not be discharged into the ground orinto any waterway, unless first rendered innocuous through subjection to someacceptable form of treatment.