following instructions on the side of each bottle)

Furnished with refill-indicatorviewing slots

internal flow control and filter to remove impurities from the water flow

: 5 1/4 in

For durability and long service life

Hayward Check Valve, 4 in, Single, Inline True Union, PVC, FNPT x FNPT - TC1400T Capacity 32 oz following instructions on the sideDesigned to help prevent the reversal of flow in piping systems where backflow could cause damage to filters, pumps, or process equipment. This HAYWARD check valve operates without the need for any adjustments or settings, and features an innovative square cut elastomer seat to seal at low back pressures. The true union design eases valve removal from piping systems without having to break down the pipe connections.