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USA Unvented cylinder - water pressure

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Tim0212

Hi, looking for advice about unvented cylinder. I had one installed as part of a horrific modular loft conversion that was recently finished. The water pressure in the bathrooms is poor, probably worse than when just had combi and I cant use two showers/bathrooms at one time which was the point in having it installed. When first installed it seemed good but then there was a leak in the system. Leak was fixed but pressure now poor. The tested cold incoming measures at 22 lpm and 3 bar but when i check this in bathrooms its less than 8lpm. The plumber is refusing to return as loft company arent paying him(think theyre going under) and his only advice is that the incoming supply is the issue. Im not convinced though due to rate during test and i've recently tested outside tap and its 3 times quicker than inside. The new shower in loft occassionally has fluntuating pressure that you can see by eye. Does anyone have any advice?
 
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Pretty noisy as well

20181111_203818.jpg


20181111_203818.jpg
 
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Tim0212 said:
Pretty noisy as well

View attachment 35434

View attachment 35435
Click to expand...

That pump is a secondary return pump

Only way they could install it is from the cold cylinder connection to the hot

But that won't work on your cylinder

If it's plumbed into the cold eg cold is flowing from the stop tap to this then out to your cylinder then that would add some restriction
 
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Another interesting part of the puzzle is that he said that loft firm owe him 10k and were trying to get him to sign contact retrospectively which said they were just an agent and the contract was between me and him. He was saying there was no way hes going to sign it...not sure where this leaves me legally!
 
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These are the questions you need to ask. I would still say as he’s physically installed there is liability. Particularly as he’s installed it so wrong. Also it’s funny that he’s coming up with the excuses already
 
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Riley said:
These are the questions you need to ask. I would still say as he’s physically installed there is liability. Particularly as he’s installed it so wrong. Also it’s funny that he’s coming up with the excuses already
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Doesn't help the home owner but if the loft company put the wrong cylinder up there before the plumber started. They owe him money and are about to go bust and told him to make it work or he will never see his money
He may be stuck between a rock and hard place.
 
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