All pipings of plumbing systems shall be of durable NAMPAP-

APPROVED materials, free form defective workmanship, designed and constructed

by Registered Master Plumbers to ensure satisfactory service.

No water closet shall be located in a room or compartment which

is not properly lighted and ventilated.

Sewage or other waste from a plumbing system which may be

deleterious to surface or sub-sutface waters shall not be discharged into the ground or into any waterway, unless first rendered innocuous through subjection to some acceptable form of treatment.

Supplant another Registered Master Plumber after definite

steps h::lve already been taken toward his/her being

commissioned to perform the contract.

Injure falsely or maliciously, directly or indirectly, the

reputation of another Registered Master Plumber by reviewing

his/her work for the same client unless the professional

services of the former have been officially terminated and 2-U

professional fees have been fully paid by the client;

The drainage piping system shall be designed to provide adequate

circulation of air free from siphonage, aspiration or forcing of trap seals under

ordinary use.

All premises intended for human habitation, occupancy or use shall

be provided with a supply of pure and wholesome water, neither connected with

unsafe water supplies nor subject to hazards of backflow or back-siphonage.

Advertise in self-laudatory language, act in any manner and

engage in any practice which tend to bring dishonor to the

dignity of the Registered Master Plumber, the National Master

Plumbers Association of the Philippines (NAMPAP) and the

plumbing profession.

Plumbing systems shall be subjected to such tests to effectively

disclose all leaks and defects in the workmanship.

Underbid another Registered Master Plumber by reducing

his/her professional fees after being informed of the 'Ccs

charged by the other Registered Master Plumber;

All plumbing fixtures shall be installed properly spaced, to be

accessible for their intended use.

Take the advantage of a salaried government position to

compete unfairly with a practicing Registered Master Plumber;

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.

Plumbing shall be installed by Registered Master Plumbers with

due regard to the preservation of the strength of structural members and the

prevention of damage to walls and other surfaces through fixture usage.

Act in an unprofessional manner and demand any

remuneration other than his/her original charges except for

additional services not covered in the basic contract;

The drainage system shall be designed, constructed and maintained

to safeguard against fouling, deposit of solids, clogging and with adequate cleanouts so arranged that the pipes may be readily cleaned.

Plumbing shall be designed and adjusted to use the minimum

quantity of water consistent with proper performance and cleaning.

Each fixture directly connected to the drainage system shall be

equipped with a water-sealed trap.

Plumbing fixtures shall be made of smooth non·absorbent material,

free from concealed fouling surfaces and shall be located in ventilated enclosures.

Vent terminals shall extend to the outer air and installed to preempt

clogging and the return of foul air to the building.

Plumbing systems shall be maintained in serviceable condition by

Registered Master Plumbers.

Each family dwelling unit on premises abutting on a sewer or with

a private sewage-disposal system shall have at least one water closet and one kitchen-type sink. Further, a lavatory and bathtub or shower shall be installed to meet the basic requirements of sanitation and personal hygiene .

No substance which will clog the pipes, produce explosive

mixture~ destroy the pipes or their joints or interfere unduly with the sewage-disposal process shall be allowed to enter the building drainage system.

Devices for heating and storing water shall be so designed and

installed as to prevent dangers from explosion through overheating.

Where a plumbing drainage system may be subject tb backflow of

sewage, suitable provision shall be made to prevent its overflow in the building.

Proper protection shall be provided to prevent contamination of

food, water, sterile goods and similar materials by backflow of se\vage. When

necessary, the fixture, device or appliance shall be connected indirectly with the

building drainage system.

If water closets or other plumbing fixtures are installed in buildings

where there is no sewer within a reasonable distance, suitable provision shall be made for disposing of the building sewage by some accepted method of sewage treatment and disposal, such as a septic tank.

Allow the use of his/her License as Registered Master Plumber

for a fee to an unlicensed Master Plumber in plumbing works

without his/her personal supervision.

When was the "Revised National Plumbing Code" approved?