Viking Johnson 08543 6 Inch Swing Check Valve

The Viking Johnson 08543 Model G-1 swing check valve is a 6-inch, heavy-duty backflow-prevention valve designed to stop reverse flow in fire protection, water distribution, and industrial piping systems. Manufactured by Viking, it features automatic non-return operation, a DN 150 nominal size, and a maximum working pressure of 300 PSI for reliable continuous-duty service in water and process-fluid applications. Commonly installed in fire sprinkler networks, pump discharge lines, water treatment facilities, and process piping, the valve protects upstream equipment and maintains system integrity in HVAC, utility infrastructure, and OEM fluid handling setups.