2-1/2" Grooved Rigid Coupling – Ductile Iron, UL/FM Approved

🔩 2-1/2" Grooved Rigid Coupling – UL/FM Approved for Fire & Mechanical Piping

This 2-1/2 inch Grooved Rigid Coupling is engineered to provide a strong, immovable connection between grooved-end steel pipes. It’s ideal for use in fire sprinkler mains, HVAC systems, and mechanical loops where pipe alignment must remain fixed under pressure.

Constructed from high-strength ductile iron and finished with corrosion-resistant orange enamel or galvanized coating, this rigid coupling features a pre-lubricated EPDM gasket for fast, reliable sealing. Certified for safety and code compliance, it’s both UL Listed and FM Approved.

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⚙️ Key Features

• Size: 2-1/2" nominal pipe size (NPS)
• Pipe OD Compatibility: 2.875" (Schedule 40 steel pipe)
• Material: Ductile iron housing (ASTM A536)
• Gasket: Grade E EPDM, factory-lubricated
• Finish: Painted or galvanized for corrosion resistance
• Certifications: UL Listed, FM Approved, ANSI/AWWA C606 compliant
• Design: Rigid – holds pipe sections in fixed alignment

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📐 Specifications

• Working Pressure: Up to 500 PSI (varies by system)
• Temperature Range: -30°F to 230°F (EPDM)
• Installation Torque: Typically 50–70 ft-lbs

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🧱 Why Ductile Iron?

Ductile iron is the trusted choice for grooved couplings in demanding installations:

• High pressure capability: Reliable in fire and industrial systems
• Durability: Impact-resistant and built for long-term service
• Protective finish: Factory coated to resist rust, wear, and moisture

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💡 Applications

• Fire sprinkler risers and main lines
• Commercial HVAC water loops
• Industrial mechanical piping systems
• Water supply and return lines

Certified. Rigid. Built for secure connections in high-performance systems.

❓ Frequently Asked Questions

1) What pipe size is this designed for?
This coupling fits 2-1/2" Schedule 40 steel pipe with a 2.875" outside diameter.

2) Is it certified for fire suppression use?
Yes, it is UL Listed and FM Approved for use in fire protection piping systems.

3) Does it come with gasket and bolts?
Yes, the product includes the ductile iron housing, EPDM gasket, and two bolts for installation.

4) Is this a rigid or flexible coupling?
This is a rigid coupling — it holds the pipe in a fixed position with no flexibility or deflection.