I am renovating my (large) house and am currentley upgrading my water
South staffs water need to know the size of pipe that I require it
will be supplying :3 baths 5 showers 10 washbasins 2sinks (4 hot
cylinders total 650 litres)10 toilets plus the normal washing machines
etc. My guess was a 40mm supply would be about right,but, thats all it
is,aguess! any help greatly appreciated.
Will all the appliances be used all at the same time ? If not, I think you
could show a bit of diversity on the supply. If you were running the house
as a bed 'n' breakfast then you'd need to install tanks in the loft for the
washing water at least, or else you're talking of a supply in the region of
Sorry, I forgot to add that the hot water wil be from unvented
cylinders, also where do I read new postings as I have been in in this
building game for a few years and might be able to help with some
Then I'd ask for something like a 28mm or 32mm mains supply if you think
that 50% of the appliances are going to be used at any one time. I also
read that your installing unvented hot water storage, so this will need to
be replenished quickly if other appliances are also being used at the same
time as they are.
There are considerable advantages to be had by dividing and reducing at the
point of entry to the house. Run independent feeds to the HWC, the kitchen
and the cold bath taps, and they will be far less affected by taps opening
elsewhere than a single "rising main" type feed that snakes around the
house. Toilets, basins and appliances can share feeds as flow rate changes
aren't so critical. You don't care that the toilet feed drops to half when
the washing machine is filling.
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