Boshart Industries 1-1/4 in. Deep Well Air Volume Control Valve Lead Free

This deep well air volume control prevents tanks from becoming air bound by maintaining proper air volume. Float operation open the air valve on water level drop (increase in tank air) and permits air to bleed from the tank to the atmosphere as the tank refills. Has a durable plastic housing with sealed plastic float, stainless steel rod and hardware.|Deep well air volume control|1-1/4 in. MPT tank connection|Durable plastic housing with sealed plastic float, stainless steel rod and hardware|Housing is tapped with a 1/4 in. FPT pressure gauge port