4" (101.6 mm) Rigid Grooved Coupling

4" (101.6 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
GGRC400 4" (101.6 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
4.500" (114.3 mm) 500 PSI (3.45 MPa) M12x65 5.472" (139 mm) Outside Diameter x 7.480" (190 mm) Maximum Width x 1.929" (49 mm) Thick
Thermafit Industries Part Number Availability
XGQT001114 Usually Ships Within 48 Hours


Product Description

4" (101.6 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 4" (101.6 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 M12x65 nuts and bolts facilitate quick installation.

4" (101.6 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: 5.472" (139 mm)
  • H: 7.480" (190 mm)
  • L: 1.929" (49 mm)


Technical Documents

Click here to view the manual for this 4" (101.6 mm) Rigid Grooved Coupling.

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