The Gruvlok Fig. 7004 is designed to provide the versatility of a grooved joint while providing a rigid pipe joint.
The Fig. 7004 coupling permits working pressure ratings up to 1200 psi (82.7 bar).
This coupling is also suited for lower pressure systems which experience pressure pulses. Systems used for high pressure, including auto and truck washes, will benefit from the increased pressure capability.
Working Pressure & End Load values are based on grooved standard wall pipe.
Fig. 7004 provides a rigid joint and does not allow for expansion or contraction. The Fig. 7004 coupling is an ideal choice for higher pressure applications such as elevator services.
NOTE: Fig. 7004 can be used with EG fittings as a commercial joint only.

The Gruvlok Fig. 7004EG High Pressure Coupling uses the specially designed “End Guard” gasket for use with “EG” grooved pipe. The “EG” gasket has a center rib which extends between the pipes in order to provide pipe end protection, which makes it ideally suited for internally lined or coated pipe applications. The Fig. 7004EG High Pressure Coupling permits working pressure ratings up to 2500 psi (172.4 bar). Working Pressure and End Load values are based on “EG” cut grooved schedule 80 steel pipe. Fig. 7004EG provides a rigid joint and does not allow for expansion or contraction. Beveled end pipe should not be used with “EG” gaskets.

Gruvlok Fig. 7377 is a flexible coupling utilizing double groove technology designed for high pressure piping applications. Fig. 7377 is specifically designed for use in mining, oil, gas, slurry, sludge, and hydraulic systems. The maximum working pressure for each pipe schedule and size are listed in the table below. Fig. 7377 is an ideal solution for high pressure applications, exceeding Anvil’s Fig. 7004 capabilities. See page 3 for double groove piping dimensions.

Gruvlok Fig. 7377 is a flexible coupling utilizing double groove technology designed for high pressure piping applications. Fig. 7377 is specifically designed for use in mining, oil, gas, slurry, sludge, and hydraulic systems. The maximum working pressure for each pipe schedule and size are listed in the table below. Fig. 7377 is an ideal solution for high pressure applications, exceeding Anvil’s Fig. 7004 capabilities. See page 3 for double groove piping dimensions.