• Stainless steel body Single housing sleeve access port design for easy maintenance Ball valve type test cocks No special tools are required Compact design Tri-link check modules provides lowest pressure loss Groove fittings allow integral pipeline adjustment The maximum working pressure is 175 psi (12.06 bar) The wetted surface of this product contacted by consumable water contains less than one quarter of one percent (0.25 percent) of lead by weight

This Maxim(TM) 4 inch lead free double check valve backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. It is ideal for protection at cross-connections identified as non-health hazards such as on high flow fire systems and from other contaminants found at the service line entrance. This compact modular design with a single access sleeve for easy maintenance is approved for horizontal or vertical installation in accordance with the direction of the flow arrow on the assembly. It consists of a stainless steel body, tri-link check valves, grooved gear operated butterfly valves with tamper switch, and test cocks.