Definitions for "MAIN DRAIN"
Keywords:  deepest, suction, drain, spa, tub
The suction fitting located in the lowest portion of an in-ground pool. It's the principal intake for an in-ground pool's circulation system.
That portion of the drainage system between the fixture drains and the sewer drain. See also Fixture drain and Sewer drain. Home Improvement Encyclopedia
Also called the drain, this plumbing fitting is the start of one suction line to the pump and is usually situated at or near the center bottom of the pool. To view our Main Drains click here.
Keywords:  riser, supply, testing, flow, pressures
A flow connection found at each riser that allows the testing of available water supply pressures.
Keywords:  outlet, see
see Main Outlet.