Summary
Highlights
A water system with a water heater requires a T and P relief valve. When connecting horizontal drain lines, a combination Y and 1/8 bend fitting should be used.
The main vent is the principal artery of the venting system. Portable water is satisfactory for drinking and culinary purposes, meeting PNS DW requirements. The invert is the lowest interior portion of a non-vertical pipe.
The minimum pressure for flush tank supplies is 8 PSI. Plumbing systems must be tested to disclose leaks and defects in workmanship. Plumbing systems should be maintained in serviceable condition by registered master plumbers.
The plumbing code's intent is to ensure public safety. A globe valve is suited for installations requiring throttling, actuated by a stem screw and handwheel.
A pump circuit system circulates hot water. The waste test for a drainage system should be at least 10 feet ahead. Pig lead is used to seal a caulked or bell and spigot joint.
All shower compartments must have a minimum finished interior area of 0.6 square meters. Sizes of vertical and horizontal drainage pipes are determined by total fixture units.
Requests for inspection by a master plumber must be made to the administrative authority at least three working days before the work is tested. NAAP stands for the National Master Plumbers Association of the Philippines.
Drinking fountains should not be installed in public toilet rooms. A fixture unit is equivalent to a flow rate of 1 cubic foot of water per minute or 7.5 GPM. In sizing water supply systems, velocities should not exceed 3 meters per second.