5" Grooved Flexible Coupling – Ductile Iron, UL/FM Approved

🔩 5" Grooved Flexible Coupling – UL/FM Approved for Fire, HVAC & Industrial Piping

This 5-inch Grooved Flexible Coupling is designed to provide a secure, flexible, and high-strength pipe connection for fire protection systems, mechanical piping, HVAC loops, and industrial applications. Constructed from ductile iron with a corrosion-resistant finish and fitted with a pre-lubricated EPDM gasket, this coupling allows for vibration absorption, axial pipe movement, and deflection — all while maintaining a tight, leak-free seal under pressure.

Trusted by contractors and engineers for its reliability and speed of installation, this coupling is UL Listed and FM Approved to meet the most demanding performance and compliance standards.

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⚙️ Key Features

• Size: 5" nominal pipe size (NPS)
• Flexible design handles movement and reduces stress on pipe connections
• Material: Ductile iron with protective coating (painted or galvanized)
• Gasket: EPDM rubber, factory-lubricated
• Certifications: UL Listed, FM Approved, ANSI/AWWA C606 compliant
• Quick-install bolt pad design for easy alignment and torque

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📐 Specifications

• Pipe OD Compatibility: 5.563" (Standard for 5" steel pipe)
• Working Pressure: Up to 500 PSI (depends on system design)
• Temperature Range: -30°F to 230°F (EPDM gasket)
• Installation Torque: Typically 70–90 ft-lbs

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🧱 Why Ductile Iron?

Ductile iron is the preferred material for grooved fittings because of its superior strength and long-lasting durability:

• High pressure tolerance: Handles demanding mechanical and fire systems
• Flexibility: Absorbs pipe vibration and allows for thermal expansion
• Impact resistance: Won’t crack under stress or shifting loads
• Protective coating: Resists corrosion in challenging environments

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💡 Applications

• Fire sprinkler system mains and risers
• HVAC supply and return piping
• Industrial and commercial mechanical piping systems
• Chilled and condenser water loops

Reliable. Code-compliant. Built for commercial-grade performance.

❓ Frequently Asked Questions

1) What pipe size does this coupling fit?
This coupling is designed for standard 5" Schedule 40 steel pipe with a 5.563" OD.

2) Is this approved for fire protection use?
Yes. It is both UL Listed and FM Approved for use in fire suppression systems.

3) Does it include everything needed for installation?
Yes. The coupling includes the ductile iron housing, EPDM gasket, and bolts.

4) Can this be used with PVC pipe?
No. It is designed for use with steel or ductile iron piping systems only.