VACUUM RELIEF VALVE Existing customers can log in to their account for additional savings Call for price Categories: Chemical, Chemical Tank Truck Parts Specification SpecificationsDual Purpose Vacuum/Pressure Vent Part # Design Weight (lbs.) Installed Height DOT3X407T 3" 11 5/14" over top of pipe nipple DOT407LT 4" 11 51/4" over top of pipe nipple Related products Spool Adapters – Domestic Cam Couplings – Domestic C Smooth Bore PTFE Hose Spool Couplers – Domestic