Not defending Hep in any manner as I believe they are big enough to stick up for themselves but I've came across a few "failures" like this and discovered all manner of faults including, no inserts at all, JG inserts used with Hep2o, green ring been demounted and fitted the wrong way round, no o-ring, green ring and o-ring incorrectly positioned (wrong sequence).. you get my drift.
Personally I think that if a fitting is demountable then its going to fail at some point, mainly because unless you fitted it the first time and no-one has fiddled about with it beforehand you don't know how many times its been taken apart to see how it works and then reassembled. This new generation of Hep2o can be demounted but the internals cannot be taken apart. I believe they have a 50 year guarantee on the fittings now as well.
But in saying that, I try and avoid plastic if I can as it looks really ugly and buckles when its hot.. and their new Hep2o fittings are easily taken apart when you can get to them, but try demounting a 22mm elbow under a floor from above...its not easy..
Personally I think that if a fitting is demountable then its going to fail at some point, mainly because unless you fitted it the first time and no-one has fiddled about with it beforehand you don't know how many times its been taken apart to see how it works and then reassembled. This new generation of Hep2o can be demounted but the internals cannot be taken apart. I believe they have a 50 year guarantee on the fittings now as well.
But in saying that, I try and avoid plastic if I can as it looks really ugly and buckles when its hot.. and their new Hep2o fittings are easily taken apart when you can get to them, but try demounting a 22mm elbow under a floor from above...its not easy..