This cast iron wye pattern strainer, 1/2 inch watts model 77S, has an iron body with 20 mesh screen, threaded connections, stainless steel screen, threaded iron retainer cap with non-asbestos gasket and tapped blowdown connection. It is designed to protect system components from dirt, rust and other damaging debris in the piping system. It is used in steam and liquid applications. It is furnished with a machined seat that allows the screen to be self-aligning to assure a perfect fit. Maximum pressure (non shock) 400 psi (27.6 bar) at 150 degree F (66 degree C) WOG, 250 psi (17.2 bar) at 406 degree F (208 degree C) WSP.