John Guest Straight Coupling - 20mm

This coupling is designed specifically for 20mm MDPE (Medium Density Polyethylene) pipe.

Yes, this coupling is suitable for both hot and cold potable water systems.

No, installation is tool-free. You simply push the pipes into the coupling until they are fully seated.

To disconnect, you typically need to press the collar of the fitting while pulling the pipe out. Refer to the specific release mechanism of your fitting if unsure.

The couplings are supplied in a pack of 15 for convenience and cost-effectiveness, suitable for multiple installations or larger projects.

Yes, it is suitable for potable water systems, which can include outdoor applications like garden taps, provided the pipework is appropriately protected.

Ensure the pipe is fully inserted into the coupling and that the pipe ends are clean and undamaged. Re-seat the pipe or replace the coupling if the pipe is deformed.

Check that you are using the correct size MDPE pipe (20mm) and that the pipe end is cut square and free from burrs. Slightly moistening the pipe end can sometimes help.

Verify that the pipe has been pushed in far enough to fully engage the internal gripping mechanism. If the pipe is loose, it may be deformed or not the correct size for the fitting.