Multi Fittings 78331 Pvc Expansion Joint Coupling 1-1/4 in

Product Description

The MULTI FITTINGS 78331 is a PVC expansion joint coupling designed to accommodate thermal expansion and contraction in rigid PVC conduit systems. Sized for 1-1/4 inch trade conduit, it spans a total length range of 13 by 9 inches and measures 2 inches in width, giving the installer meaningful travel range to handle seasonal or installation-related movement. This fitting is an essential component wherever rigid conduit runs long distances or crosses expansion joints in structures. Electricians and conduit installers use this type of coupling to prevent stress cracking, joint separation, and conduit misalignment caused by temperature-driven dimensional changes.

This expansion joint coupling is suited for rigid PVC conduit installations in commercial and industrial electrical applications. It is commonly installed in long conduit runs on building exteriors, parking structures, and large concrete slabs where significant temperature swings occur. The fitting handles movement without breaking the conduit system's integrity, making it appropriate for both new construction and retrofit conduit work where thermal movement must be managed.

Key Features

• Constructed from PVC for corrosion resistance and compatibility with rigid PVC conduit systems
• 1-1/4 inch trade size fits standard rigid PVC conduit of that diameter
• 13 by 9 inch length range provides adequate travel for thermal expansion and contraction cycles
• 2 inch width supports stable seating within the conduit run
• Designed specifically for use with rigid conduit, maintaining system continuity through movement

Compatibility

Designed as an OEM-style replacement and standard-fit coupling for 1-1/4 inch rigid PVC conduit systems.

Installation Notes

Installation is performed by licensed electricians in accordance with applicable NEC requirements for conduit expansion fittings. Power down and lock out all circuits in the conduit run before servicing or replacing any conduit fitting. Solvent cement appropriate for PVC conduit should be used at joints per manufacturer instructions, and adequate time must be allowed for cure before pulling wire. Do not over-stress the fitting during alignment; the conduit run should be properly supported on both sides of the expansion joint.