"This product was a nightmare to find on the website and should have additional product info to say pipe inserts would be required but the actual product was very easy to fit.
I have always been doubtful of quick fit products and as this was to replace a leaking joint from the mains entry point before the stopcock under kitchen cupboards i was nervous.
Job was done in half an hour including replacing the copper piping and a couple of compression joints. Only leak was my fault for not tightening up a joint on an elbow after the adaptor which fitted in seconds. Time will tell if it lasts the guarantee period of 25 years but it's great not to have a leak under the kitchen sink! Make sure you have a 20mm pipe stiffener insert before replacing. Should be one in the old pipe but best to check."