The Apollo lead free pressure reducing valve model PRC (36CLF Series) is designed to protect residential and commercial water distribution systems by automatically controlling excessive pressure changes. The valves integral thermoplastic cage provides maximum corrosion resistance. Designed for easy in-line servicing with bottom cleanout access to seat disc and strainer. The valve is built for long reliable service with proven ASTM grade lead free materials. Built-In Thermal Expansion Bypass. Balanced piston design. Sealed spring cage for vault installations. SS adjusting screw & nut. Bottom access to seat disc & SS strainer. Factory preset at 50 psi (-01). controlled pressure ranges:10-35 psig, 25-75 psig (standard), 75-125 psig. 100% manufactured in USA.