On Jan 16, 9:46*pm, Skipweasel wrote:
In article ,
says...

Ideally if the butt runs dry then the supply needs to
switch back to mains water (either manually or
automatically).

I thought about doing that, but it was ridiculously hard to comply with
the water regulations. If it were as simple as a double non-return valve
I'd have done it, too.


Does it need to comply with the water regs if it is not directly
connected to the water supply? I mean, does connection to the sewer
mean it has to comply?

Suppose you fed the loos ONLY from the water butt and also had a ball
valve in the water butt so if it got very low it was filled form the
mains.

Robert