W
windycol
I am converting a stone barn with 4 washrooms to fit and a remote boiler ( 3 Ph electric due to an abundance of solar power) I intended to fit a hot water loop system, however on aquiring the required PB barrier pipe (polyplumb) i find that the application notes for this product say under no circumstances should this be used for this type of installation.:thumbs_down: So not being one to take this lying down I started digging a hole! first i spoke to polypipe to ask why? they said it was due to the oxygen content of the hot water being constantly circulated would over time strip away the barrier layer??? This sounded a little off so decided to speak to WRAS and ask if this also applied to Pex? they couldn't comment however in the course of the conversation it became apparent that WRAS approval for polypipe was originally for cold water use and that the approval for hot water had been achieved by a work around using Bs 7291 part 1 2 or 3. The WRAS approval expired in august and to date, no application has been made for re-approval, for either cold water use or for hot water use which would require a lengthy testing.
Apart from this though, My question/concern is that my understanding is that Pex is also approved under BS7291 part 1,2 or 3 and also would not be suitable under this for use in hot water loop circuits yet many suppliers of Pex and PB are saying Pex is o/k
WHAT IS GOING ON HERE?
Apart from this though, My question/concern is that my understanding is that Pex is also approved under BS7291 part 1,2 or 3 and also would not be suitable under this for use in hot water loop circuits yet many suppliers of Pex and PB are saying Pex is o/k
WHAT IS GOING ON HERE?