The Gruvlok ® 78FP UL/ULC Listed and FM Approved Check Valve is a compact, cost effective valve, designed for use in grooved-end pipe fire protection systems and related equipment. Valves are to be used in conjunction with grooved pipe and pipe couplings that are listed or approved for fire protection systems.

The Gruvlok Series 7800 Check Valve is a compact, cost effective valve offering low pressure-drop, non-slam performance. The Series 7800 Check Valve assembly is lighter and faster to install, and costs less than flanged and wafer valve assemblies.
In the fully open position the Series 7800 swing clapper is held tightly against the valve body, out of the flow stream, to provide maximum flow area and prevention of clapper flutter. The clapper design produces quick, non-slam closure before flow reversal can occur, while meeting FM requirements for an anti-water hammer valve rating.
Each valve is hydrostatically tested for leak tightness to 500 PSI. The clapper- seat design permits leak free sealing of back pressures in service conditions ranging from 300 PSI (20.7 bar) to as low as 1 PSI (0.07 bar) (head pressure: 28").

The 400G is a center guided, spring loaded, silent check valve. Designed and engineered for silent operation with low head loss, the valve disc will close prior to the reversal of flow, thereby preventing or minimizing water hammer and damaging shock.
• The 400G can be used in any HVAC, industrial or commercial grooved piping systems.
• The valve is designed for liquid service with any pipe orientation, flow up or down.
• Bronze metal seats are standard, with Stainless Steel or resilient seats available as an option.
• Flow coefficients for this valve are some of the lowest in the industry and are listed for each size on the drawing.

The Fig 90G Check Valve is designed for use with Anvil Gruvlok couplings for fast and easy installation on grooved pipe.
Grooved ends conform to the requirements of AWWA C606.
The valve is fitted with a large bonnet closure for ease of field servicing.
All Fig 90G Check Valves are supplied with a ½" NPT pipe plug installed in the bonnet cap.
The valve is available with Bonnet Gaskets and Clapper Seals made from EPDM or Nitrile.