heard a rumour ?

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NRV needs to be internal now.
stops them being prone to freezing when fitted outside ie in the tap.
 
my books older than that and it's in that.

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My WRAS guide was printed in 2001 and external NRVs were not permitted then, so it's been in force for at least ten years.
 
I think the water regs were 1998 and slightly amended in 1999.

Perhaps some of the tutors are a little remiss in not pointing it out.
 
I think the water regs were 1998 and slightly amended in 1999.

Perhaps some of the tutors are a little remiss in not pointing it out.

or i didnt pay proper attantion :oops: but then iv only been in the game since 05 and iv been adviced since then to use them, good job i dont fit many
 
It is mandatory to fit them to prevent backflow.

They should be inside!
 
It is mandatory to fit them to prevent backflow.

They should be inside!

Yes they should be prevented from freezing by being installed
inside the building or by other means.

= Should. Not shall or must.
 

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