Heavy-Duty Rigid Grooved Coupling | UL/FM | Ductile Iron (ASTM A536) | EPDM/NBR | DN25–DN300 (1″–12″)
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Heavy-Duty Rigid Grooved Coupling | UL/FM | Ductile Iron (ASTM A536) | EPDM/NBR | DN25–DN300 (1″–12″)

"Built for fixed-alignment joints in grooved piping, this heavy-duty rigid coupling locks pipe ends to eliminate axial and angular movement—ideal for fire protection, HVAC, and industrial services where “zero deflection” is required. The housing is high-strength ductile iron (ASTM A536) with corrosion-resistant coating; the pressure-responsive gasket (EPDM standard, NBR optional) seals against the pipe OD for fast, leak-tight installation. Rigid joints also simplify hanger spacing in line with common piping codes.

Designed to meet groove dimensions per AWWA C606 and interoperate with standard roll-/cut-grooved steel pipe and grooved fittings/valves. Typical working pressures for standard rigid series are in the hundreds of psi depending on size and wall thickness; high-pressure “HP” series reach up to 1000 psi (size-dependent)—check the data sheet for your diameter and service. UL Listed / FM Approved options are available for fire sprinkler mains, risers, and mechanical rooms."

 
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