Transitioning PVC-Coated Conduit from 1″ to 3/4″


Chris, I am transitioning my run from a 1” to ¾” and I am not sure what I should use to reduce down in size at the condulet body. Any suggestions?


In this instance, you should use a reducing coupling accompanied with a short nipple.. Often times a reducing bushing is used which will result in a system that is not sealed due to a gap left between the sealing sleeve and the conduit. Using a reducing coupling with a short nipple will solve this problem. Photos are included below for reference.

Incorrect Method

Incorrect Use of Reducing Bushing Creates Risk of Failure

Incorrect transition with the use of PVC-coated Reducing Bushing
A reducing bushing (1″ – ¾”) was inserted into the C Condulet Fitting. The conduit entering this fitting is 3/4”. Take note of the gap between the sealing sleeve and conduit. This gap is a void where water can collect and will ultimately lead to failure over time.

Correct Method

Use Reducing Coupling for Transitioning for Maximum Protection

Correct Installation with Reducing Coupling
Instead of using a reducing bushing you should use a reducing coupling (REC).  The REC is female/female; to make the connection between the REC and condulet body use a short nipple.  The desired end result is a sealed system.

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