Model,Cat. No.:1”,25mm – 25AVRVInstant and continuous vacuum relief Large air chamber for air reliefSeal tight at 0.34 bar/5 psi8 bar/125 psi working pressure Max. operating pressure:10 bar/145 psi Protection capDurable, weather resistant, corrosionresistantConstruction : ABS plastic and elastomersealInlet : 1” NPT male thread