Summary
Highlights
Fittings must be installed at all changes in direction (T's and bends), changes in size (reducers), and at stoppers like dead ends and valves.
Thrust blocking must be tightly fastened with corrosive-resistant fasteners up to the floor, with the top surface 6.4mm above the finished floor. Closet rings are also mentioned in this segment.
Components like CT (control valve) and PRV (pressure reducing valve) in a water distribution system must be installed on the water heating system in an approved location, adhering to listing requirements and manufacturer instructions.
Back pressure refers to air pressure in drainage pipes greater than atmospheric pressure. A corporation stop is inserted into the water main and controls the water service.
Drains from roofs, inner courts, vent shafts, light wells, or similar areas must discharge to the outside of the building or gutter. Threaded plastic pipe requires a minimum wall thickness of Schedule 80. Storm water is also identified as rainwater.
A vertical pipe is installed at an angle of not more than 45 degrees with the vertical. A pipe with an angle greater than 45 degrees from the vertical axis is considered horizontal. Solder fluxes with lead content exceeding 0.02% are prohibited in piping systems conveying potable water.
CS and PS stand for commercial standards and product standards. A distribution pipe is a pipe between the water meter and the fixtures. Republic Act No. 6541, known as the Building Code of the Philippines, was enacted before martial law.
A tailpiece connects the outlet of a plumbing fixture to the trap. Revent and back vent are also known as individual vents.
A ballcock is a valve opened or closed by the fall and rise of an attached ball floating on the water surface. Horizontal drainage lines connecting to other horizontal drainage lines must enter through combination Y and 1/8 bend branches, or other approved fittings of longer sweeps, specifically 45-degree Y branches.
A full-way gate valve must be installed on the cold water supply pipe to each water heater, near the heater. An air test should be used to check the tightness of a drainage or plumbing system if there's reason to believe it has become defective.