DIY Network

How to Use Compression Fittings

Compression fittings are strong and reliable fittings that can be put on using just a pair of wrenches. Because these fittings don't require heating, they work well with wet pipe.

More in Plumbing

compression fittings work well with wet pipes
  • Time

    30 Minutes

  • Price Range

    $1 - $50

  • Difficulty



Step 1: Remove Burrs and Debris

Before attaching a compression fitting, remove any burrs or debris from the inside and outside of the pipe ends.

Step 2: Position the Compression Fitting

Slide the compression nut onto the end of the pipe (it should fit snugly), followed by the ferrule and the compression body. Slide the nut and ferrule onto the fitting threads, and hand-tighten. Firm the joint by using two wrenches to tighten the nut and fitting body securely.

use two wrenches to tighten and firm the joint