How to set up 1st fix incoming cold water supply

[dereke]

Renovating an older property with good water pressure. Proposing combi on 1st floor, but am not sure if it should be 1st take-off... If it were to be it would mean doubling back pipework to kitchen and then back upstairs to service sinks etc.. Then there is the electric shower supply... Any commonsense advice appreciated re the best way to lay out the pipework.

 

[Ben-gee]

Just as it comes, in a sensible route - with least total pipework.
It won’t make any difference the order in which it is done when only one thing is being used. And when multiple outlets are being used; restricting the flow at these and sizing of the Combi for hot water demand will be of more importance.

 

[dereke]

Just as it comes, in a sensible route - with least total pipework.
It won’t make any difference the order in which it is done when only one thing is being used. And when multiple outlets are being used; restricting the flow at these and sizing of the Combi for hot water demand will be of more importance.

Thanks Ben-gee.
So, aside from double check valves on incoming water, shower and boiler, with single check valves to hot water at outlets and WM, you are saying I should put in some sort of gate valve to be able to reduce flow to other services if supply to the boiler ever becomes a problem?

 

[Ben-gee]

No I’m talking about designing it in, as in purchasing taps/showers with lower flow rates and aerators to fluff up the water if you’re concerned about having sufficient flow available elsewhere.
If you have good dynamic pressure and flow rate then it’s less of a concern.