Apollo 62-100 Series Stainless Steel Check Valve, Ball Cone, 3/4" NPT Female Ball cone check valve restricts flow control to one direction, blocking reverse flow Valve body made of ASTM A-351 cast stainless steel for longer life in severe environments 400 pounds per square inch (gauge) (psig) rating for cold working pressure (CWP) and 125 for steam working pressure (SWP) Cracking pressure of 0.5 psi Female National Pipe Taper (NPT) threads on both ends for connecting to male threaded pipes