After 2 years of continuously frozen pipes(H+C) on the downstairs of our new house during the winter, I got a plumber in recently to alter the downstairs layout. Problem was poor build quality linked to pipes located in the floor cavity, the floor being on stilts and draughty as hell. The cold supply was cut where it went below and new pipes installed in 15mm copper, except the downstairs toilet which was done in HEP20, all above the floor level. A days work, done neatly and the only snag being he spotted that the pipes they fitted were these plastic german ones at 16mm/20mm which I went and got inserts for to link into standard 15/22 fittings. I'd considered doing it myself but aside from me thinking of doing it all in hep 2 it's been done with comp/yorkshire fittings
Since doing the work we have noticed shuddering going on mainly coming from the thermal store. It's when a tap is turned off suddenly and cold supply is not affected, just hot.
Can this be sorted by tweaking the pressure? I did google it and read about "water hammer" on some american site? Hope it doesn't have this or in fixing one problem I now have another...
The weird thing with that "new improved" resized Geman stuff is that any inline connectors(crimp fitted) that were removed have a narrower internal diameter. I thought that by reducing a pipes diameter velocity went up but pressure went down? Now all of the ground plumbing is done in traditional 15mm/22mm it doesn't have this venturi effect could that have anything to do with it, ie raised pressure?
The system has a PRV fitted, without it it's 7 bar and we have it set to 4.
Any advice much appreciated!
Since doing the work we have noticed shuddering going on mainly coming from the thermal store. It's when a tap is turned off suddenly and cold supply is not affected, just hot.
Can this be sorted by tweaking the pressure? I did google it and read about "water hammer" on some american site? Hope it doesn't have this or in fixing one problem I now have another...
The weird thing with that "new improved" resized Geman stuff is that any inline connectors(crimp fitted) that were removed have a narrower internal diameter. I thought that by reducing a pipes diameter velocity went up but pressure went down? Now all of the ground plumbing is done in traditional 15mm/22mm it doesn't have this venturi effect could that have anything to do with it, ie raised pressure?
The system has a PRV fitted, without it it's 7 bar and we have it set to 4.
Any advice much appreciated!
