Our swing check valves are designed to prevent backflow while being able to maintain full flow performance with very little turbulence or pressure loss. Specifications: Brass Construction For horizontal use only F NPT x F NPT Download Spec SheetTabsPart Finder Size ½”¾”1”1¼”1½”2” Result SKU: SWCV1/2 Part Table 6 Items Part Size SWCV1SWCV1 1” SWCV1/2SWCV1/2 ½” SWCV125SWCV125 1¼” SWCV15SWCV15 1½” SWCV2SWCV2 2” SWCV3/4SWCV3/4 ¾”