Legend 101-043 1/2" Sweat S-1001 Full Port Ball Valve Working Pressure, Non Shock (PSI) Cold working pressure (CWP): 600 p.s.i. Saturated steam (WSP): 150 p.s.i Durable forged brass body. Bottom-loaded blowout-proof stem. Maintenance-free dual O-ring stem seal. Improved Dyneon* TFM PTFE seats.