Watts Quick-Connect Shut-Off Valve LP-467CS Lead free polysulfone, a high performance thermal-plastic material Connects to PEX, copper, CPVC and polybutylene Quick connections without special tools Inlet Fitting Size: 3/8" Female Comp; Outlet 3/8" Male Comp; Outlet Fitting Size: 1/4" OD nlet Fitting End Type: Compression; Outlet Fitting End Type: OD; Max PSI Rating: 125.0 PSI. Approved by NSF, CSA, ASTM and ASSE and produced from FDA approved materials