Designed for use in grid systems or any sprinkler system where pressure relief is required. The Adjustable Pressure Relief Valve can be adjusted from 75-175 psi. Specifications: Body = Cast Brass Seat packing = Rubber NPT Threaded Download Spec SheetTabsPart Finder Result SKU: APRV1/2 Part Table 2 Items Part Size APRV1/2APRV1/2 ½” APRV3/4APRV3/4 ¾”