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

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

This 1-1/2 inch Grooved Rigid Coupling is engineered to provide a fixed, high-strength connection between grooved steel pipes. Designed for use in fire sprinkler systems, HVAC piping, and mechanical installations, it offers a rigid, non-deflecting joint that maintains proper pipe alignment under high pressure.

Constructed from durable ASTM A536 ductile iron and finished with protective orange enamel, this coupling comes with a pre-lubricated EPDM gasket for water systems. It meets strict safety and performance standards, being both UL Listed and FM Approved.

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⚙️ Key Features

• Size: 1-1/2" nominal pipe size (NPS)
• Material: Ductile iron housing (ASTM A536)
• Finish: Orange enamel or galvanized coating
• Gasket: Grade E EPDM, factory-lubricated
• Design: Rigid style – no axial or angular movement
• Certifications: UL Listed and FM Approved

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📐 Specifications

• Pipe OD Compatibility: 1.900" (Standard for 1-1/2" Schedule 40 steel pipe)
• Working Pressure: Up to 500 PSI
• Temperature Range: -30°F to 230°F (EPDM)
• Installation Torque: Typically 30–50 ft-lbs

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🧱 Why Ductile Iron?

Ductile iron is the trusted standard for high-pressure piping connections:

• Strength: Handles demanding mechanical and fire system loads
• Durability: Resists cracking and corrosion in harsh conditions
• Safety: Certified to meet UL/FM standards for peace of mind

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💡 Applications

• Fire sprinkler risers and main lines
• Chilled water and condenser loops
• HVAC system headers and branches
• Mechanical room and utility piping

Strong. Certified. Installation-ready.

❓ Frequently Asked Questions

1) What pipe size does this coupling fit?
It fits 1-1/2" Schedule 40 steel pipe, which has a 1.900" outside diameter.

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

3) What’s included with the product?
The coupling includes the ductile iron housing, factory-lubricated EPDM gasket, and steel bolts.

4) Can this be used for flexible joints?
No. This is a rigid coupling, designed to keep the pipe in fixed alignment with no movement.