The Campbell Manufacturing Red Brass Check Valve has a 190 degree maximum operating temperature. For 1/8"FIP inlet x 1/4"FIP outlet taps. For water, oil or gas. Machined exterior. Neoprene O-ring. Non-corroding Delrin stem guide. Tapered stainless steel screen and cap. Stainless steel spring. Certified red brass casting. This product contains less than 0.25% weighted average lead content on wetted surfaces. Max Pressure 200 PSI.