All Pressure/Vacuum Vents have three (3) separate valves that address pressure/vacuum conditions in underground storage tanks (UST) and above ground storage tanks (AST).
Features/Benefits
The three (3) valve system provides the necessary protection and durability needed in UST and AST vent caps.
The vacuum valve is diaphragm operated and provides ten (10) times more sealing force than gravity devices. It consistently opens at 6” - 10” of water column (WC) / 1.5 - 2.5 KPa vacuum.
The first over-pressure valve is diaphragm operated, giving ten (10) times more sealing force than gravity devices. It opens at 2.5” - 6” WC / .63 - 1.5 KPa pressure.
Not for use in California / EVR applications.
A slip-on vent cap with a main pliable seal that seals to the vent stack and provides leakproof protection because the seal is at the end of the vent stack, not on the threads.
Uses four (4) stainless steel set screws to grip the vent stack preventing any loosening of the seal.
Constructed from materials 100% compatible with B0-B20 and E0-E85.
