Non-metallic Vent, Cad-plated flame arrestor Application: Petroleum-Based Wt. lbs.: 0.5 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.

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