On Thu, 26 Jul 2018 11:52:58 +0100, "NY" wrote:

snip

So it would seem that using grey water (eg bathwater) *is* allowed by
hosepipe. Which is sensible: if it was otherwise going to go down the drain,
it makes sense to reuse it for watering the garden.

I guess it all depends if you want to keep it in use as drinking water
or not?

If it goes 'down the drain' it quickly goes back though the water
treatment plant and back to your tap. If it goes onto your plants and
into the ground / water table or evaporates, it wouldn't?

Or if your grey water goes into a septic tank etc.

Cheers, T i m