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3" (76.2 mm) Rigid Grooved Coupling

3" (76.2 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.
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SKU Nominal Diameter Construction Finish
GGRC300 3" (76.2 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
3.500" (88.9 mm) 500 PSI (3.45 MPa) M12x60 4.606" (117 mm) Outside Diameter x 6.535" (166 mm) Maximum Width x 1.772" (45 mm) Thick
Thermafit Industries Part Number Availability
XGQT001089 Usually Ships Within 48 Hours


Product Description

3" (76.2 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 3" (76.2 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 M12x60 nuts and bolts facilitate quick installation.

3" (76.2 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.


Grooved Fitting Dimensions

  • 0: 4.606" (117 mm)
  • H: 6.535" (166 mm)
  • L: 1.772" (45 mm)


Technical Documents

Click here to view the manual for this 3" (76.2 mm) Rigid Grooved Coupling.

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