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

🔩 1" Grooved Rigid Coupling – UL/FM Approved for Fire Protection & Mechanical Systems

This 1-inch Grooved Rigid Coupling is engineered for secure, immovable pipe connections in fire protection, HVAC, and industrial piping systems. Constructed from ductile iron with a corrosion-resistant orange enamel finish, it ensures a robust, leak-free joint that maintains system integrity under pressure.

Featuring a pre-lubricated Grade E EPDM gasket, this coupling provides a tight seal suitable for a range of applications. It complies with ASTM A536 standards and is both UL Listed and FM Approved, meeting stringent safety and performance criteria.

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⚙️ Key Features

• Size: 1" nominal pipe size (NPS)
• Material: Ductile iron conforming to ASTM A536
• Finish: Non-lead orange enamel paint
• Gasket: Pre-lubricated Grade E EPDM (Type A)
• Certifications: UL Listed, FM Approved
• Design: Rigid coupling for fixed, non-deflecting joints

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📐 Specifications

• Pipe OD Compatibility: 1.315" (Standard for 1" Schedule 40 steel pipe)
• Working Pressure: Up to 500 PSI (application dependent)
• Temperature Range: -30°F to 230°F (EPDM gasket)
• Installation Torque: Typically 30–50 ft-lbs

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🧱 Why Choose Ductile Iron?

Ductile iron offers superior strength and durability, making it ideal for high-pressure piping systems:

• High Strength: Handles demanding mechanical and fire protection applications
• Durability: Resistant to impact and wear for long service life
• Corrosion Resistance: Protective coating guards against rust and environmental factors

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💡 Common Applications

• Fire sprinkler systems
• HVAC piping networks
• Industrial process piping
• Water supply systems

Reliable. Compliant. Built for performance.

❓ Frequently Asked Questions

1) What pipe size does this coupling fit?
It is designed for 1" nominal pipe size, which has a 1.315" outside diameter.

2) Is it approved for fire protection systems?
Yes. This coupling is UL Listed and FM Approved for use in fire suppression and sprinkler system piping.

3) Does it include the gasket and bolts?
Yes. Each coupling includes the ductile iron housing, pre-lubricated EPDM gasket, and bolts for installation.

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