INBREATHING AND OUTBREATHING VENTS Existing customers can log in to their account for additional savings Call for price Categories: Liquid - Petroleum, Petroleum Tanks Truck Parts Description Specification Description Installed in vapour plumbing as safety devices to relieve pressure or vacuum build up when vapour systems are blocking during loading/unloading 4″ TTMA flange mounting (Aluminum) Stainless steel shaft and buna seals Specifications Part # Description VRP3500 Outbreathing vent (opens at 1 PSI pressure) VRV3501 Inbreathing vent (opens at 1.5" Hg vacuum) Related products Contitech Plicord Extremeflex Kuri Tec TigerFlex TV Blacksnake Curb Pump Hose Continental Infinity