The water supply pipes of residential quarters are introduced from the municipal water supply pipelines; the nodes of the outdoor annular pipe network of residential quarters shall be set according to the separation requirements. When the annular pipe section is too long, a segmented valve should be installed; the beginning of the branch pipe connected from the main water supply pipe of the residential area or the beginning of the household pipe; The upper and lower ends of the pipe network riser); the branch pipe of the annular pipe network, the connecting pipe running through the branch pipe network; the starting end of the water distribution pipe from the indoor water supply pipe to the households, public toilets, etc., and the water distribution branch pipe Set when there are 3 or more points; the water outlet pipe of the water pump, the suction water pump of the self-priming water pump; the inlet, outlet and drain pipes of the water tank; the water inlet and water supply pipes of equipment (such as heaters, cooling towers, etc.); Water distribution pipes for sanitary appliances (such as toilets, urinals, washbasins, showers, etc.); certain accessories, such as automatic exhaust valves, pressure relief valves, water hammer eliminators, pressure gauges, sprinkler hydrants, etc. front and pressure relief valves and the front and rear of the backflow preventer; a drain valve should be installed at the lowest part of the water supply pipe network.
