John Guest Mdpe Compression Conversion Adaptor - 20mm X 15mm

Yes, the compression fitting on the MDPE side is designed for secure, leak-proof connections suitable for standard water pressures encountered in property supply lines.

No, this adaptor is specifically designed and WRAS approved for potable water applications only.

While not explicitly stated, John Guest fittings are generally designed to operate within standard domestic hot and cold water temperature ranges.

For the MDPE compression side, you will need wrenches to tighten the compression nut. The copper push-fit side typically requires no tools, just firm hand pressure to seat the pipe.

Push the copper pipe firmly into the fitting until you feel it seat fully. A secure connection is achieved when the pipe cannot be easily pulled out.

WRAS approval signifies that the product has been rigorously tested and meets the Water Regulations Advisory Scheme's standards for materials and performance in contact with wholesome water for drinking, domestic, and commercial purposes in the UK.

Yes, it is designed for use with standard 20mm MDPE pipe, which is often flexible.

Ensure the compression nut is tightened sufficiently. Check that the MDPE pipe is fully inserted and not damaged. Verify the pipe liner is correctly installed, if applicable.

Ensure the copper pipe is pushed in fully and seated correctly. Check the copper pipe end for any burrs or damage that might prevent a seal. Try re-seating the pipe.

Ensure the copper pipe end is clean, de-burred, and not deformed. A small amount of silicone lubricant can sometimes help, but avoid excess.

Verify that the correct size MDPE pipe (20mm) is being used. Ensure the compression nut and olive are correctly positioned and tightened evenly.