Pool Main Drain Connected To Skimmer

A swimming pool main drain uses suction to pull pool water through it.

Pool main drain connected to skimmer. American national standards institute and published by the american society of mechanical engineers. You can use either flex or rigid pvc. Other plumbing lines may be connected to step jets a pool cleaner line or fountains and water features. Dave the float valve aka turtle aka spaceship is a diverter to allow control of the flow from the skimmer and the main drain.

Skimmers sit near a swimming pool s waterline taking in water via gravity and letting it flow down to the filter. Without the float valve most of the suction going into the rear hole will be from the top down the path of least resistance. The return line is the pipe that carries water from the pool filter back to the wall return inlets. There is a float that fits below the skimmer basket which closes when the water level drops then only the drain is used.

The main drain is typically located at the deepest point of the pool and is used to lower the water level however its primary purpose is to circulate water from the bottom of the pool. Screw in a 1 5 male threaded adapter in the side of each main drain. Flip both main drains over so they are upside down on a level surface and use primer and pvc glue on a 3 ft piece of pipe between them. Swimming pool plumbing diagrams 1 standard skimmer with 2 main drains 3 returns.

The main drain is connected most often to the front hole and the rear hole goes to the pump. Swimming pool circulation pumps draw water from the pool utilizing suction plumbed to the skimmer inlets at water level and the main drain at the pool s bottom. This is a common practice now which prevents damage to the pump if the water level drops below the skimmer inlet. 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.

Main drains in swimming pools sit in their lowest points. Is the drain connected to through the skimmer. Water is pulled to the circulation.