To clear more space in our kitchen I'm moving the washing machine into
the lean-to. The lean-to already has a cold water supply.

I've always used hot and cold fill but I'm thinking that because the
gas-heated water comes from the hot water tank upstairs and is heated by
the boiler downstairs, the long pipe runs probably make this an
unnecessary & inefficient option given that modern washing machines use
so little water for the washing cycles anyway.

What do people think?

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Si