Boosting Incoming Water pressure/flow with pump

[gaza b]

I recently fitted a combi-boiler. Everything is fine when i only put one hot tap on anywhere (12-13 litre/min) in the house, but if i put a hot tap on upstairs and then open a cold or hot tap downstairs i lose my water flow upstairs. So i changed my mains water stop cock from 15mm to 22mm and put a 22mm feed from it to a Tee. From this Tee my household cold water is then supplied in 15mm and also my 'DHW' through my combi boiler in 15mm. I want someone to recommend a booster pump i can fit 'in-line' directly after my stop cock which will supply both my combi and household cold water. I know i should have a break tank but are willing to take the risk. I have been looking at the grundfos UPA 15-90 amongst others. Any suggestions ?

Regards
Gary

 

[Agile]

No normal pumps are rated for the mains pressure.

Nor is it permissable as you seem to know.

As the boiler will not heat more than 9-13 li.min whats the point of having much more?

Are you CORGI to fit the boiler?

Tony

 

[Softus]

Any suggestions ?

Fit a break tank.

Are you CORGI to fit the boiler?

Why is that relevant?

 

[billy bob]

Fit an accumulator

 

[simond]

Somebody else recommending accumulators, crikey!

You need to ascertain your water supply standing pressure, if this is over approx 1.5bar then an accumulator will give you the result you are looking for.

Most merchants will sell you a pressure gauge for about £20.

 

[gaza b]

Thanks to everyone for your advice. How does the accumulator work and can anyone recommend which is the best type to purchase ?

Regards
Gary