USA Unvented cylinder - water pressure

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Discuss Unvented cylinder - water pressure in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Also you can buy a cheap pressure tester that will screw on at your washing machine valve
 
J have done. Kitchen sink comes straight from boiler and hot is about 8lpm. Same as shower in loft. Test on outside tap is consistent with their test. Was definitely over 20lpm
 
And to be fair the incoming is the least of your worries with the abortion cylinder install
 
I may be hedging my bets here but is there a chance that these cowboys have actually accidentally bypassed the cylinder and your hot water is all coming from the Combi still
 
Tim0212 said:
J have done. Kitchen sink comes straight from boiler and hot is about 8lpm. Same as shower in loft. Test on outside tap is consistent with their test. Was definitely over 20lpm
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Cold water test the cold please
 
Tim0212 said:
I will get somebody onto it. What are the main risks of having it on side?
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No warranty could split due to not designed for that

Have they allowed for the weight load in that area
 
It’s not installed to spec. It won’t heat correctly, your drawing off hot water from half way up so it won’t be hottest if cylinder is going through a reheat
 
It wouldn’t as the water will take the easiest route and that’ll be to the kitchen tap
 
Tim0212 said:
It does sit on a huge 'I' beam and this loft firm have done hundreds of these. Doesnt mean their installers haven't been completely useless!
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Based on what you’ve told us I wouldn’t trust any of it and would be getting it independently signed off
 
Tim0212 said:
I will do. Thanks for your advice. Its much appreciated. What i still dont understand though is why when i first used the shower on first floor it was like a power shower!
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I don’t think it matters mate. Get it fixed properly and safely. Let us know how you go
 
Just one further question. The plumber put a pump on the cold water supply because he said without it i wouldnt get many showers worth. Is this kind of pump needed on vertically installed units or did he know what he was doing was rubbish and decided to get the best out of it? He advised at the time that he was going to tell the loft firm that it needed one.
 
Can't pump mains water
 
Pretty noisy as well

20181111_203818.jpg


20181111_203818.jpg
 
Tim0212 said:
Pretty noisy as well

View attachment 35434

View attachment 35435
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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
 
Any chance on getting a bit more light in there ?
 
Either way won’t make a jot of difference to his issue i suppose. If it’s loud it could be dry
 
being used as a strat pump which with your cylinder doesnt do anything
 
I mean I’d be intrigued how he explains it all. I would ask him for a formal written explanation
 
If he was using it just as a secondary pump it could be to ensure no huge water draw off before you get hot at a tap
 
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!
 
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
 
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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