"Wasn't sure about these but had a very small gap between a wall and a joist to re-plumb so thought i'd give them a go. O ring clasps around the pipe, as long as the pipe is clean and round you will have no leaks.
Can't comment on long time reliability as only just fitted them."
"I used these to stop off the pipes for the shower so we could use the bathroom before the shower was fitted. Very convenient and easy to pop off with a removal tool (small plastic ring you can buy separately). Very useful."
"Agree with most of the other reviewers they work well, and no damage to the pipe ie compression or solder residue when you complete the project. They are though not quite as sturdy as the old push fit caps, and of course you do need then newer extractor tool to remove these because of the design changes."
"If you want to cap copper pipe, but there is some residual water present, then one of these will do the job; it's impossible to solder with residual water. I gave the product only 4 stars for reliability, as I have just fitted it - longevity still to be proven. It's also quite pricey."
"Used a couple of these to block pipes for the old sink, bath and toilet when putting in my new bathroom suite. Buy this, a pipe cutter, a deburring tool and wire wool and you're in business. Also buy a push fit removal tool as it's less that a quid and these stop ends are reusable up to 20 times."