SlideLOK Couplings by Anvil Gruvlok


From in-stock to special order products, The Granite Group has what you need when it comes to PVF. We partner with the best manufacturers in the industry like Anvil International to provide quality products that make your job easier. The SlideLOK Coupling by Anvil Gruvlok will save you time on your next pipe install.

The patented 74FP SlideLOK coupling is the most rigid ready-for-installation coupling on the market.

Features include:

  • A unique slide action eases assembly and reduces installation time - even the last coupling can be installed without separating pipe ends.
  • The patented 4Seal Pressure Responsive Gasket eliminates pinching and provides four separate sealing surfaces for added protection.
  • Designed for use with roll, cut, or swage grooved steel pipe, Gruvlok® and SPF® grooved-end fittings and valves.
  • Allows for a maximum working pressure of 450 psi on roll or cut grooved carbon steel standard wall pipe.
  • Provides a rigid connection allowing pipe hanging practices per ASME B31 Pipe Codes.


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