Vents tank while filling and draining
Hayward's true union air release valve
will vent a tank with flows up to 150
GPM. During filling operations air is
released until liquid reaches the ball,
which floats against the FPM* elastomer
seat, thereby preventing overflow.
As liquid in the tank is drained, the
ball drops which allows air to enter
into the tank to eliminate any risk of
the tank walls collapsing. For flow
rates in excess of 150 GPM, use multiple
valves. PVC air release valves are
supplied with screen and both socket
and threaded connectors.
* Comparable to VitonT