Universal Reverse Thread Ribbed OD – Aluminum Couplers

The universal coupler can be used as a general purpose coupler, but they have particular applications in situations where the conduit system is constructed with a variety of different types or sizes of innerduct.  The couplers are made like our standard reverse thread couplers, except the amount of taper is increased and the additional length allows enough taper to be machined into the coupler to accommodate a wide variation in the outside diameter of the duct, while still having enough thread engagement to give the coupler good pullout strength.  They work equally well with corrugated, ribbed, or smooth-wall conduit.  These tapered universal couplers are widely used in repair work and are a practical, inexpensive way of reducing inventory costs.  These couplers have a ribbed outside diameter (OD).

Aluminum couplers should NOT be installed under the following conditions:
* In wet environments or submerged in water.
* In strong acidic or alkaline environments outside the PH range of 4 to 8.
* Near salt water or direct exposure to road salt run off.
* In concrete or cement stabilized sand.
Consult your project engineer.