Outside tap, supply from existing Washing Machine supply

use this makes the install look better and all your connections will be inside.

p44301_x.jpg
 
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the water regs require a double check valve fitted inside to stop possible contamination through back flow, you should also fit the pipe to external with a very slight angle to outside and an isolating valve, in winter close valve and open tap to empty pipe other wise you may get a burst pipe
 
no regs state they want them fitted inside now.
then they don't freeze in the winter.
 
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I assume then there is no requirement for the tap to have NRV ? Otherwise it will be 3 :eek:
 
not really.
the check valve in your wm valve is only a single not a double.
 

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