How to Install Copper Press Fittings - A Simple Guide

Updated: September 12, 2023

Copper press fittings are fast becoming a go-to choice for many plumbing projects due to their quick installation, dependability, and adaptability. In this guide, we'll provide you with an easy step-by-step process for using copper press fittings, ensuring a solid and leak-free connection.

1. Assemble Your Supplies and Equipment

Before you begin, make sure you have the following materials and equipment ready:

  • Copper press fittings
  • Copper pipes (BS EN 1057)
  • Press tool with suitable jaws for your fittings
  • Pipe cutter
  • Deburring tool
  • Cleaning brush or emery cloth

2. Get the Copper Pipes Ready

Plumber cutting pipe with pipe cutter ready to be joined
  • Measure and mark the required length of the pipe.
  • Use a pipe cutter to cut the pipe flat to the marked length.
  • Use a deburring tool to eliminate any burrs or sharp edges from the freshly cut end of the pipe.
  • Clean the exterior of the pipe with a cleaning brush or emery cloth to remove any contaminants, grease, or oxidation.

3. Prepare the Copper Press Fittings

Close up shot of some press fittings showing the gaskets inside.
  • Examine the fitting for any damage or defects.
  • Inspect the O-ring inside the fitting for any signs of damage or wear.
  • Confirm that the fitting is the appropriate size for the pipe you're using.

4. Assemble the Connection

Image showing a copper press fitting with a copper pipe ready before crimping
  • Slide the pipe into the fitting until it reaches the stop.
  • Make sure the fitting is correctly aligned with the pipe.
  • Use a marker to draw a line on the pipe at the edge of the fitting. This will help you ensure the fitting is crimped in the right place during pressing.

5. Secure the Connection

Image showing copper press fitting being crimped by press gun
  • Position the press tool jaws around the fitting, ensuring they're aligned correctly.
  • Activate the press tool to crimp the fitting onto the pipe. The press tool will exert the necessary force to create a secure and leak-proof connection.
  • Release the press tool jaws and remove the tool from the fitting.

6. Verify the System

  • After installing all the fittings, test the system.
  • Pressurise the system and inspect for any signs of leakage at the connections.
  • If you detect any leaks, re-press the connection or replace the fitting as required.


Copper press fittings offer a fast and reliable method for joining copper pipes. By following these steps and using the appropriate tools, you can achieve a secure and leak-proof connection for your plumbing system.

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