Utilities

• Principle No. 22


  Sewage or other waste from a plumbing system which may be deleterious to surface or sub - surface waters shall not be discharge into the ground or onto any waterway, unless first rendered innocuous through subjection to some acceptable form of treatment.
• Principle No. 21


  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
• Principle No. 20


  All plumbing fixtures shall be properly spaced, to be accessible for their intended use.
• Principle No. 18


  Where a plumbing drainage system may be subject to backflow of sewage, suitable provision shall be made to prevent its overflow in the building.
• Principle No. 17


  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 septic tank.
• Principle No. 19


  Plumbing systems shall be maintained in serviceable condition by Registered Master Plumbers.
• Principle No. 15


  Proper protection shall be provided to prevent contamination of food, water, sterile goods & similar materials by backflow of sewage. When necessary, the fixture, device or appliance shall be connected indirectly with the building drainage system.
• Principle No. 14


  No substance which will clog the pipes, produce explosive mixtures destroy the pipes or their joints or interfere unduly with the sewage disposal process shall be allowed to enter the building drainage system.
• Principle No. 13


  Plumbing systems shall be subjected to such tests to effectively disclose all leaks and defects in the workmanship.
• Principle No. 12


  Vent terminals shall extend to the outer air and installed to preempt clogging and the return of foul air to the building.
• Principle No. 11


  The drainage piping system shall be designed to provide adequate circulation of free air from siphonage, aspiration or forcing of trap seals under ordinary use
• Principle No. 10


  Each fixture directly connected to the drainage system shall be equipped with water - sealed trap.
• Principle No. 9


  All piping of plumbing systems shall be of durable NAMPAP - APPROVED materials, free from defective workmanship, designed & constructed by Registered Master Plumbers to ensure satisfactory service.
• Principle No. 8


  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 might be readily cleaned.
• Principle No. 7


  Plumbing fixtures shall be made of smooth non- absorbent material, free from concealed fouling surfaces & shall be located in ventilated enclosures.
• Principle No. 6


  Each family dwelling unit on premises abutting on a sewer or with a private sewage disposal system shall have at least 1water closet & 1 kitchen-type sink. Further, a lavatory or bathtub or shower shall be installed to meet the basic requirement of sanitation & personal hygiene
• Principle No. 5


  Every building having plumbing fixtures installed & intended for human habitation, occupancy or use on premises abutting on a street, alley or easement where there is a public sewer, shall be connected to the public sewer system.
• Principle No. 4


  Devices for heating and storing water shall be so designed and installed as to prevent dangers from explosion through overheating.
• Principle No. 3


  Plumbing shall be designed and adjusted to use the minimum quantity of water consistent with proper performance and cleaning.
• Principle No. 2


  Plumbing fixtures, devices and appurtenances shall be supplied with water in sufficient volume & at a pressure adequate to enable them to function satisfactorily & without undue noise under normal conditions of use
• Principle 1


  All premises intended for human habitation, occupancy or use shall be provided with a supply of pure and wholesome water, neither connected with unsafe supplies nor subject to hazards of backflow or back siphonage.
• There are 22 basic principles of the 1999 National Plumbing Code of the Philippines which are updates of the tenets in the "Plumbing Law of the Philippines" approved on June 18, 1955 as amended on November 28, 1959 and revised on December 21, 1999.