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PostPosted: Tue Aug 29, 2017 8:04 am 
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Hi all, I need to move my incoming water and stopcock for reconfiguring a kitchen. The entire house relies on a 15mm supply which I'm moving about 3 feet. It's 15mm copper coming in through the external wall under a concrete floor.

Would it be beneficial or correct at all to dig a little deeper outside the wall too and swap the pipe to 22mm? Or even plastic until it's inside the building?

Pressure is very good already so don't think this is an issue but would it help with later once other internal Ts are splitting off the main?

Ta V much.


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PostPosted: Mon Sep 04, 2017 2:33 pm 
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15mm / ½" is quite standard for a normal sized domestic house its more than enough.


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PostPosted: Mon Sep 04, 2017 3:56 pm 
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Should really be a minimum of 25mm blue alkathene back to the water meter.

Unless you are renewing all the water main, then don't bother, 3ft at the end isn't going to make much difference

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