Storage Tank Accessory, Fill Cap, Pre-Vent (Liquidynamics - Model 901055)

The Pre-Vent fill cap is designed for use on small above ground gasoline, diesel and oil storage tanks.  The primary purpose of this cap is to pressurize the storage tank and reduce evaporation loss and condensation.  The pressure cap valves open at 2-1/2 PSI and the vacuum release opens at 1-1/2 ounces.  Threas are 2" NPTM.