USA Unvented cylinder - water pressure

[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?

 

[Riley]

I’d be suggesting you will almost certainly need to enhance your incoming to achieve any of the top end results. Let alone running both showers at the same time. Most cylinders of that size can produce around the 50lpm mark, some more some less, but this is intrinsically linked to the pressure and flow rate leading to the cylinder.

 

[ShaunCorbs]

Showers want around 44lpm for both

 

[skoronesa]

I don't understand why you haven't contacted your local authorities or who ever is in charge of licensing. It sounds like you paid thousands of pounds for garbage that you were told was correct and it all needs to be taken apart and replaced. I would be livid.

I think the longer you wait to hold these guys accountable the worse it will be for you.

 

[Riley]

I see you’re in the USA sadly it doesn’t work like that here. The regulatory bodies are pretty toothless

 

[Tim0212]

• Indeed, it seems as though i'm powerless. Awaiting quote which is likely to be over the 2k that im holding back. Loft company going under and unable to contact plumber so will follow process in terms of getting quote and formalising to loft company. I will go on a big list of creditors. They owe my builder 46k and probably numerous others so dont expect anything if over 2k. Ive reported to trading standards and will to gas safe but dont expect any help. Dire indeed.

 

[Riley]

Happens all too often unfortunately

 

[Gasinspect]

Can't pump mains water

yes you can, Salamander and a couple of others are WRAC approved

 

[ShaunCorbs]

yes you can, Salamander and a couple of others are WRAC approved

12lpm which is no use to anyone on an unvented

 

[999]

Wow, thats some installation !
Rectifying that set up is whats going to be hard

 

[oilman]

It is a legal requirement for anyone installing unvented cylinders to be trained and qualified. It must also be notified to building control.
There are unvented cylinders made to be horizontal.

 

[Mark K]

Yeah its a dark space. Hopefully these help

View attachment 35438

View attachment 35439

Is that pic the right way up? the pump is on the ceiling with the head pointing down?