What Pipe Diameters to use for Hot and Cold Supply


Postby HCross » Sat Aug 01, 2015 11:56 am

Hi Everyone,
I'm new to posting in this forum although I have often used it for loss of tips with previous projects.
My situation is this...
I'm redoing my water pipes in my flat which has a 15mm cold feed in.
I have a combi boiler.
I'm putting in pex piping like for underfloor heating as I'm in Hungary and it's standard.
It's a small flat, so total of 2 sinks, loo and bath/shower.
What diameter pipes should I use for my cold and hot?
I was thinking of either
1... 16mm throughout
2... 22mm from cold feed to combi with 16mm branches for appliances
And hot all in 16mm
Please shoot me down if appropriate.

Thanks
HC
HCross
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