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Designated as an American National Standard, the Uniform Plumbing Code (UPC) is a model code developed by the International Association of Plumbing and Mechanical Officials to govern the installation and inspection of plumbing systems as a means of promoting the public's health, safety and welfare.
Interceptors require a retention time of 30 minutes to allow the fats, oils, grease, and food solids to settle in the tank. As more wastewater enters the tank, the grease-free water is pushed out of the tank. The rotting brown grease inside a grease trap or grease interceptor must be pumped out on a scheduled basis.
Standard codes are followed when designing (or manufacturing) a piping system. Organizations which promulgate piping standards include: ASME: American Society of Mechanical Engineers A112.19.1 Enameled cast-iron and steel plumbing fixtures standards; A112.19.2 Ceramic plumbing fixtures standard
Water enters at right, fills the trap, and continues left. Inverted siphoning occurs below the line "A". Examples of traps [further explanation needed] In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass ...
Joel Ducoste, an industry expert, suggests that smaller-scale grease traps do the job just as well with regular cleaning and maintenance. Tacoma’s grease-trap policy is like using a sledgehammer ...
The scope of standard residential plumbing usually covers mains pressure potable water, heated water (in conjunction with mechanical and/or electrical engineers), sewerage, stormwater, natural gas, and sometimes rainwater collection and storage.
Sanitary manholes should be constructed at locations where there is a change from a simple straight sewer line. These include all junctions that combine multiple lines into one or split from one, bends, changing in elevation, changing in pipe size, and changing in pipe type.
At the national level, the Environmental Protection Agency has set guidelines about what constitutes lead-free plumbing fittings and pipes, in order to comply with the Safe Drinking Water Act. [53] Some widely used Standards in the United States are: [citation needed] ASME A112.6.3 – Floor and Trench Drains