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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USA Unvented cylinder - water pressure
View the thread, titled "Unvented cylinder - water pressure" which is posted in Bathroom Advice on UK Plumbers Forums.
The incoming supply has never been touched and has old stopcock so think its 15mm. The cold cylinder incoming was taken from the cold pipe under the stairs which is also 15mm (photo attached). From the first floor i believe they are all 22mm pipes up to cylinder which is horizontal in loft eaves.
That stopcock is going to reduce the flow
Also the cylinder isn't rated for horizontal install best get the plumbing firm back as install is not to regs also not fit for purpose
Also the cylinder isn't rated for horizontal install best get the plumbing firm back as install is not to regs also not fit for purpose
Tell him the insulation isn't to spec and regs and needs to be re done at his own cost
Also the hot outlet on the side
Seen it all now get em back thats not fitted correctly or report em to gas safe they will force them to put it right or give you your money back so you can employ another engineer to sort it, do you have a compliance certificate ? Kop
Horizontal cylinders have all the connections on the top so they can be serviced easily and have internal dip tubes so they don't suck cold water
No i have nothing from them. Apart from vertical cylinder can you explain other issues? I would be surprised if loft company would have used them if not gas safe as all part of contract for sign off and commissioning. Could they get away with it by saying they didnt specify cylinder (the loft company did?)
They installed it in that manner the buck falls with them
Yes and the 15mm service
I seriously cant believe this. Should i highlight anything other than the cylinder direction. He had discussed putting a pump on the cold water(under the stairs)? Is the pressure on outside tap good because all on 15mm pipe? If cylinder pipework was 15mm would it have been better pressure?
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