Question: 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?
Answer: 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 a nipple will solve this problem. Photos are included below for reference.
Photo Caption 1: Incorrect- a reducing bushing (1″ – ¾”) was inserted into the C condulet fitting. The conduit entering this fitting is ¾”; make 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.
Photo Caption 2: (Correct) 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.