Swimming pool plumbing diagrams 1 standard skimmer with 2 main drains 3 returns swimming pool main drains must be installed in accordance with the virginia graeme baker pool and spa safety act and all applicable asme ansi safety standards american national standards institute and published by the american society of mechanical engineers. Inground pool skimmer plumbing diagrams posted on december 27 the pipe that connects to the pump is from the pool the pipe that connects to the filter is to the pool built in 1962 our swimming pool 5 lane 25 yard dive tank has the equalizer line skimmers. Weve already seen that the water in a swimming pool needs to circulate through a filtering system to remove dirt and debris during normal operation water flows to the filtering system through two or more main drains at the bottom of the pool and multiple skimmer drains around the top of the pool the main drains are usually located on the lowest point in the pool so the entire pool . Mar 1 2017 this pin was discovered by thea wentzel discover and save your own pins on pinterest