"I have used these on both central heating and my cold water supply in places where plastic push-fit or soldering would have been almost impossible. I trust them completely - never had one leak or problem. (By the way, to help your pipe measurements, the pipe slots 13mm into the joint).
Pros - they are slim and can be fitted in tight places; they are removable with the right tool; they allow the joint to twist which is a godsend; they are unbelievably easy to fit, look quite nice and are very strong and reliable.
Cons - more expensive than end feed or solder ring joints, and you have to make sure they are pushed on square. It seems to me that if you pushed them on at a bad angle too hard you could damage the rubber or teeth, but you'd have to be pretty incompetent to do it."
"After a couple of plumbing nightmares with compression fittings I decided to give these a go. I must just say they are brilliant and do not leak at all even if the pipe work is misaligned slightly. What a discovery!!! I will only ever use these in the future."
"I've only ever used push on fittings on plastic pipe before but I had to move some central heating pipes to accommodate a new radiator and they are copper. Very pleased with the fittings, more expensive than the solder type but as I don't have soldering equipment these push on fittings made the job very easy."
"I have done bits and bobs of plumbing over the years and I have done solder and compound. But these pushfits are the dogs b's. Cant rate them enough. Great for tight spots when you don't want to set fire to the room with a blow torch. Done most of my bathroom with them, just got to finish off fitting the new radiator and am done and up to now everything is looking good."
"these really are so easy to use, and reuse. however the best thing is if you only have a short run of pipe to your rad/tap by using this type of fitting it remains flexable so if you have to remove the rad, once drained and undone you can simply rotate the valve from the rad."
"In a tight space under a sink these fittings are excellent, the other variants like flexibles etc are great too so easy and worked perfectly on my copper pipes. I had been nervous about using them which is the reason ive left a review as i am greatfull to others who pointed me in the direction of these fittings. Being able to spin the elbow once fitted is a great bonus."
"I was changing a radiator and the existing pipework was immoveble without removing the floor, so using 4 of these and some 15mm copper pipe i was able to fit the new rad with the minimum of fuss. Best thing about these is that you can turn them to the correct angle when they're fitted which makes plumbing for DIYers like me just so easy. I also bought the tool for removal, great if you don't quite get it right the first time (like me)"
"Have fitted a few of these fittings now and all are working fine and have not leaked, even the one's that are fitted to C/ H system. Just remember to file the edges of the copper pipe if you have to cut your pipe with a hack saw if you do not the chances are you will cut the rubber ring that is inside the fitting and it will leak. Best to use a pipe cutter if you can."
"For simple easy connections especially where access is awkward these will make your job easier. As long as your pipe cuts are clean with no burs, and any paint is cleared from the joint area, you will have no problems. these are not fit and remove if not quite right fittings so take your time, but other than that they are neater and more compact than compression joints, and safer than soldered joints. ps the price is good too."
"Used this to join infeed copper pipe to the plastic infeed on my shower. No problems, just make sure you push pipes in as far as they will go. Too new to state reliability - two day old fitting - but dry for now:)"
"Just replaced an electric shower where the original pipework was botched and in the wrong place for a new Mira Advance shower. Rerouted from the old outlet using Conex Cuprinol elbows and tap connector exposed over the tiles alongside the new shower. Used a Screfix 500mm flexible hose with isolator looped to a 'U' to connect from the Conex copper tap connector to the shower. Looks good with exposed copper without burn or solder marks and even if I waggle the joints violently there is no sign of a leak. I am convinced there is no way these will separate by accident. I now have an exposed easy to operate isolator which wasn't present on the original fit.
These are the 21st century replacement of soldered joints. I am very impressed!"
"Simple, easy to fit. Saves me an age installing new plumbing. Also priceless in terms of piece of mind if you are not confident in your soldering abilities, or are in a confined space. I have buried these in walls and under floors in the past and they are still leak free (touch wood). I have also been able to demount these and they still work perfectly when re-mounted. NOTE If the 'gripping teeth' get flattened when demounting they can be lightly pried up with the edge of a blade etc to ensure a good grip when reused."
"They might look expensive compared to soldered joints but if you value your time - even as a DIYer they are well worth it - plus there is no mess. The main thing to bear in mind is that you have to use a pipe cutter (the edge left by a hacksaw will damage the built-in EPDM O-ring) so they can't be used to extend or repair pipes in a confined space where you can't turn a pipe cutter on the pipe. Also you have to polish up the pipe with wire wool and have it clean and scratch-free. Provided you can meet those conditions then you would be mad to use solder instead of these."