GRUVLOK© fittings, flanges, and valves.

Pinnacle Industrial Supply, Inc. is a premier distributor of GRUVLOK fittings, a line of products from Anvil International. We are committed to provide our industry with the largest selection and availability of GRUVLOK products in all of southern California. Pinnacle boasts a stock of fittings and couplings up to 14” and can stage and tag your job to specification whether it be by floor, area, or system. Pinnacle also grooves pipe up 12” to specification in house. GRUVLOK Product lines for fire protection systems, CTS copper system , and the stainless grooving method are also available to meet the demanding requirements of any project.


  • Gruvlok couplings
  • Gruvlok fittings
  • Gruvlok Valves and accessories
  • Gruvlok branch outlets
  • Gruvlok DI-LOK nipples

GRUVLOK Copper system

  • Gruvlok CTS copper system

GRUVLOK Stainless system

  • Gruvlok stainless method