The Betts PV26364ALB is a 4-inch inbreathing vapor vent, TTMA flange mount, with a Buna-N seal, providing 12,000 cubic feet per hour of air venting capacity at 1 psig.
The Betts PV26364ALB Inbreathing Vent is easily installed and adds protection to a vapor rail system. It has a through area of six square inches, opens at 6 ounces per square inch, and provides an air venting capacity of 12,000 cubic feet per hour at 1 psig.