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 Cam Couplings – Domestic C PeraFlex SGT or SST Aggressive Chemical Hose Cam Couplings – Import E Teflon Hose – Corrugated