For rotary vacuum pumps it is recommended to vent them outside the room or to an exhaust hood to prevent indoor air contamination. This vacuum pump exhaust filter enables venting rotary vacuum pumps in rooms where an outside line is either not practical or possible.
This filter also has an internal back pressure valve designed to release the element at 7.35 PSI differential pressure for pump safety. The housing comes with a 1/8" NPT oil drain port and are made of steel construction with a white enamel paint finish.