P
pal
I have to move a hot water storage cylinder to a new location. The new location is somewhat further from the boiler and the route is trickier. To that end I have considered using 22mm plastic pipe for the flow and return, it should have less thermal loss and be considerably easier to route. Its an unvented system so the working pressure should be no more than 1.5 bar under NORMAL conditions but in the case of a problem will go up to the over-pressure valve limit (which I am considering setting down to 2.5 bar). What is bothering me is the combination of temperature and potentially elevated pressure on the joints, I don't want them popping. Has anyone got any comments.