Teflon® Microporous membrane relieves pressure and vacuum
Fits round octagonal-base or circular-base bung openings
These unique vent plugs begin venting at any pressure differential. Prevents liquid from leaking during normal sloshing during transport and handling (not intended for horizontal drum storage). For non-flammable liquids. All plugs include EPDM gasket.
Prevent dangerous pressure or vacuum build-up in your drums. Rubber Vent is precision-molded, specially formulated to be compatible with a wide range of liquids. Steel Vent has precision spring loaded ball that opens at 1/2 to 1 1/2 PSI.