SEAN3513 7 Posted May 5, 2012 Report Share Posted May 5, 2012 Yep , its water hammer , usually caused by poorly clipped pipes and or high water pressure , a small 1/2 litre expansion vessel will help or cure it , fitted to the cold main, or as a trial try turning the wster pressure down on the main stop cock. A pressure reducing valve fitted next to the main stop cock may also work Quote Link to post Share on other sites
IanB 0 Posted May 6, 2012 Author Report Share Posted May 6, 2012 Fittings are good , very reliable , the 15 mm bends to about a 6" radius , dont know if thats enough ? Personaly , I would go for 22mm x 10mm manifolds.........10mm to all rads , converting the valves to each end to improve circulation, the existing twin entry valves have an injector pipe that over time corrodes and drops off , resulting in poor circulation. you should be able to fit the 10mm without having to use bends , or maybe I need to have a busmans holiday ?? I didn't want to go for the 10mm pex as I've read its just the same ID as 8mm microbore so there wasn't much point, although I know its easier to bend than the 15mm pex stuff.. I'll get stuck in when I have more time..I need to get a combi as well as the place has an old system.. Quote Link to post Share on other sites
SEAN3513 7 Posted May 6, 2012 Report Share Posted May 6, 2012 Cheers Sean so it can be sorted. How expensive of a job is it ? If its straight forward , couple of hours and about 50/60 quids worth of materials Quote Link to post Share on other sites
SEAN3513 7 Posted May 6, 2012 Report Share Posted May 6, 2012 Fittings are good , very reliable , the 15 mm bends to about a 6" radius , dont know if thats enough ? Personaly , I would go for 22mm x 10mm manifolds.........10mm to all rads , converting the valves to each end to improve circulation, the existing twin entry valves have an injector pipe that over time corrodes and drops off , resulting in poor circulation. you should be able to fit the 10mm without having to use bends , or maybe I need to have a busmans holiday ?? I didn't want to go for the 10mm pex as I've read its just the same ID as 8mm microbore so there wasn't much point, although I know its easier to bend than the 15mm pex stuff.. I'll get stuck in when I have more time..I need to get a combi as well as the place has an old system.. It is , but if the runs aren't long it works fine , especially if you upgrade to 22 feeds to the manifold Quote Link to post Share on other sites
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