Enduring Quality, Exceptional Value

GRC COUPLINGS

GRC Couplings

Marathon offers a full range of couplings designed to support secure, code-compliant electrical conduit systems. These fittings are engineered for use with both EMT (Electrical Metallic Tubing) and GRC (Galvanized Rigid Conduit), delivering reliable performance across commercial, industrial, and residential installations.


Features and Benefits



  • Heavy-duty threaded GRC couplings are built to join rigid conduit sections while preserving structural integrity and electrical continuity.

  • Available in both pre-threaded and re-threaded options to reduce installation time.

  • Designed to meet NEC requirements for grounding, bonding, and overall system integrity.

  • All components are UL listed and manufactured to meet recognized safety standards.

  • Built to withstand harsh environments and provide long-term reliability.