Main drain pot, 8" with 2" Cycolac™ Hydrostatic valve and stem. ABS plastic. Pot, cover, valve stem, & hydrostatic pressure relief valve, complete set. 2" ports. Hydrostatic valves MUST be installed in pools tha are near lakes, rivers, the beach, and land that is susceptible to flooding in heavy rain.
Emaux™ Main drain pot, 8" with Cycolac™ Hydrostatic valve. ABS plastic. Pot, cover, valve stem, & hydrostatic pressure relief valve, complete set. 2" ports. Model EM2832-H
Hydrostatic pressure relief valves are required to be installed in the floor or drain sump of in-ground pools where the surrounding water table is above the base of the pool. An empty pool, even a concrete one, is like a ship, and it can be forced out of the ground by the pressure of the surrounding ground water.
