Legend Valve's S-614 PVC Compression Swing Check Valve. The S-614 has a pressure rating of 75 W.O.G. AT 72 Degrees F, and has a Maximum Service Temperature of 140 Degrees F. The S-614 is available in 1-1/4" - 1-1/2" (203-237) and 2" (203-238) sizes. Our image shown is the 1-1/2" - 1-1/4 " model. The # 203-237, 1-1/4" - 1-1/2" check valve comes with 2 Sets of Rubber Gaskets, one for each size so this one valve can work for both sizes of check valve or also act as a reducing compression union and check valve. Very Clever!