1-1/4" Grooved Flexible Coupling – Ductile Iron, UL/FM Approved

🔩 1-1/4" Grooved Flexible Coupling – UL/FM Approved for Fire, HVAC & Mechanical Piping

This 1-1/4 inch Grooved Flexible Coupling offers a secure yet flexible connection between grooved steel pipes in fire suppression, mechanical, and HVAC systems. Its flexible design accommodates pipe movement, vibration, and expansion, reducing stress on system components and ensuring long-term performance in dynamic installations.

Manufactured from durable ASTM A536 ductile iron, this coupling features a pre-lubricated Grade E EPDM gasket and is finished in either orange enamel or galvanized coating for corrosion resistance. Fully UL Listed and FM Approved, this coupling meets stringent safety and performance standards for commercial and industrial systems.

---

⚙️ Key Features

• Size: 1-1/4" nominal pipe size (NPS)
• Pipe OD Compatibility: 1.660" (Standard for 1-1/4" Schedule 40 steel pipe)
• Material: Ductile iron housing (ASTM A536)
• Gasket: Grade E EPDM, pre-lubricated
• Finish: Orange enamel or galvanized
• Design: Flexible – allows for axial movement and angular deflection
• Certifications: UL Listed, FM Approved, ANSI/AWWA C606 compliant

---

📐 Specifications

• Working Pressure: Up to 500 PSI
• Temperature Range: -30°F to 230°F (EPDM gasket)
• Angular Deflection: ±1° (varies by system)
• Installation Torque: Typically 30–50 ft-lbs

---

🧱 Why Use a Flexible Coupling?

Flexible couplings are ideal for reducing system stress and improving installation efficiency in smaller-diameter piping:

• Absorbs vibration and thermal expansion
• Reduces pipe misalignment issues
• Prevents leaks under fluctuating pressure
• Speeds up alignment and installation

---

💡 Common Applications

• Fire sprinkler branch lines
• HVAC terminal piping
• Mechanical utility systems
• Industrial process piping under 2"

Built small. Performs big. Certified for safety and flexibility.

❓ Frequently Asked Questions

1) What pipe size is this for?
This coupling fits 1-1/4" Schedule 40 steel pipe with an outside diameter of 1.660".

2) Is this UL/FM certified?
Yes — this coupling is both UL Listed and FM Approved for fire and mechanical piping systems.

3) What type of gasket is included?
It comes with a pre-lubricated Grade E EPDM gasket suitable for water-based systems.

4) Can this absorb pipe movement?
Yes — as a flexible coupling, it allows for limited axial movement and angular deflection.