Coupling Systems

 Made in America

PNA Left/Right Threaded Aluminum CouplingsCoupling LHRH Alum
PNA Left/Right Threaded Aluminum Couplings are machined from tool grade aluminum, and easily installed with a pipe wrench. Just insert both ends of duct into coupling and rotate in direction of arrow. Both ends of duct will be drawn into coupling at the same time.

Note: 1″ – 2″ couplings will fit both smooth wall and corrugated duct.

E-Loc® couplings

Coupling E-Loc collage

E-Loc couplings feature a strong PVC outer shell with a flexible polyurethane elastomer inner sleeve. This unique lining enables both smooth and corrugated duct to be joined together. E-Loc® couplings provide a watertight and airtight connection that will not separate under normal installation. Available in 3/4″ to 6″ standard Iron Pipe Sizes (IPS) plus 1″ and 1-1/4″ corrugated.

The Double E-Loc® couplingCoupling Double E-Loc


The Double E-Loc® coupling was developed for joining both smooth and ribbed HDPE duct, specifically for pneumatic methods of cable placement. These duct systems require both air and watertight integrity. The joints are usually located in vaults, manholes, or hand holes, where they are unrestrained.The standard E-Loc® coupling is pressure tight to internal pressures above 200 psi when restrained or buried, but the Double E-Loc® can maintain these pressures unrestrained.The Double E-Loc® is also reusable.

The Clear-Loc coupling

Clear-Loc Coupling

The Clear-Loc coupling is designed for easy application and allows quick installation in all types of situations, especially where tight installation conditions exist. The coupling is designed without a center stop, and the clear body allows for visual verification that the inner ducts are centered and properly aligned.  It is airtight and will hold air pressures of 150 psi when installed properly.

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