Used it to tie in new plumbing to an older manufactured home. Sharbite didnt fit. These fit that style pipe nicely. Heard they used it in older (mine is a 95) manufactured homes and was popular in Canada for a while also.Be sure to really push it on though. Seen some bad reviews about leaks. You'll push it on a bit,then push harder to when it actually bites the pipe. I've used maybe 10 so far, not one issue.One last thing to always remember when tieing into plumbing is to have a faucet or something open when you turn the water back on to remove the air in the system. Otherwise the air will compress and find or make a leak that water wouldn't have fit though.