OPW OPEN ATMOSPHERIC VENT

The OPW 23 Series Open Atmospheric Vent is a specialized vent cap designed for the top of vent pipes on underground and aboveground fuel storage tanks. These vents remain permanently open to the atmosphere, allowing internal tank pressure or vacuum to release freely.
Protection: Prevents tank vent lines from being blocked by water, debris, or insects.
Flow Capacity: Offers a high maximum flow rate of 7,000 SCFH at a 2 psi (0.1 bar) pressure drop.