Everflow Supplies 210C112-NL Sweat Brass Swing Check Valve 1-1/2 Inch - Lead Free Everflow part Number 210C112-NL Cast Brass swing check valve With solder cup connects for use with 1-1/4 inch diameter Copper pipes Maximum pressure of 200 psi wog and 125 psi swp Upc approved lead free product Approved By UPC, NSF Working Pressure 200 WOG, 125 SWP Brass Body Constructed No Lead design is suitable for all potable water supply installations. In-line back flow preventer.