Andy Hall wrote( a long time ago):
However, referring to the SI makes it all much clearer
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>
[snip]
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>Here, "shall" is used rather than "should".
>
>******
>Notification
> 5. - (1) Subject to paragraph (2), any person who proposes to
>instal a water fitting in connection with any of the operations listed
>in the Table below-
>(a) shall give notice to the water undertaker that he proposes to >begin work;
>(b) shall not begin that work without the consent of that undertaker
>which shall not be withheld unreasonably; and
>(c) shall comply with any conditions to which the undertaker's consent >is subject. >
>*****
>Part of table:-
>******
>4. The installation of-
>(a) a bath having a capacity, as measured to the centre line of
>overflow, of more than 230 litres;
(d) a pump or booster drawing more than 12 litres per minute,
>connected directly or indirectly to a supply pipe;
[snip]
(h) a garden watering system unless designed to be operated by hand; [snip]
>All of which, I interpret to mean that if you want to install
>something that might use a lot of water, you have to tell the water
>supplier so that they can come and fit you with a meter and charge you >lots of money. >
As I am contemplating buying a very big bath, I contacted my water supplier, Severn Trent, and they told me that they regarded it as a Building Control issue, and they are only interested in metering if I build a swimming pool, or install a fixed garden watering system.
Chris