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6" (152.4 mm) Grooved Coupling | Rigid
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6" (152.4 mm) Rigid Grooved Coupling

6" (152.4 mm) Rigid Grooved Coupling facilitates speedy and straight piping installations. This UL & FM-approved ductile iron coupling features an EPDM rubber gasket and two pairs of carbon-steel nuts and bolts for quick assembly.
SKU Nominal Diameter Construction Finish
GGRC600 6" (152.4 mm) Ferritic Ductile Cast Iron (ASTM A536 Grade 65-45-12) with EPDM Rubber Gasket Paint Orange
Pipe Outside Diameter Working Pressure Bolt Size Dimensions
6.625" (168.3 mm) 400 PSI (2.75 MPa) M12x75 7.815" (198.5 mm) Outside Diameter x 9.803" (249 mm) Maximum Width x 1.929" (49 mm) Thick
Thermafit Industries Part Number Availability
XGQT001168 Usually Ships Within 48 Hours


Product Description

6" (152.4 mm) Rigid Grooved Coupling forms a water-tight seal between two grooved pipes in fire sprinkler systems, standpipe systems, plumbing, HVAC, and water-based systems. Pipes joined by rigid grooved couplings behave like flanged or welded pipe, but can be installed significantly faster.

This UL and FM-approved 6" (152.4 mm) Rigid Grooved Coupling features a ductile iron body conforming to ASTM A536 Grade 65-45-12. The gasket is made from EPDM synthetic rubber, recognized as the most water-resistant rubber on the market today. Two pairs of carbon steel M12x75 nuts and bolts facilitate quick installation.

6" (152.4 mm) Rigid Grooved Coupling features built-in teeth that firmly grasp the pipe ends, facilitating straight pipe lays over short and long distances. Rigid couplings allow less than one degree of deviation from a straight line (angular deflection. This coupling offers a maximum working pressure of 500 PSI (3.4 KPa) depending on pipe diameter and thickness.


  • 0: 7.815" (198.5 mm)
  • H: 9.803" (249 mm)
  • L: 1.929" (49 mm)


Technical Documents

Click here to view the manual for this 6" (152.4 mm) Rigid Grooved Coupling.

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