FM approved vents are for use with drums in the upright position. Valve automatically opens to relieve internal pressure at 5 PSI. Automatic vacuum relief permits 4 GPM flow through 3/4" faucet. Fits 2" NPT bung opening.

 Model
No.               Description         Application
DA607    Brass Vent               Petroleum-Based
DA605   Non-metallic Vent,    Petroleum-Based
           Cad-plated flame arrestor
DA606   Non-metallic Vent,      Chlorinated Solvents