tigerlily24 wrote:
Hello

I hoping someone can help me. We've got a little courtyard with raised
beds. It's so small I thought it'd be great if we could divert all the
lovely rain water from the roof on it's way down to earth. I'm
intending to install a water butt to the down pipe. My question is:
would it be possible to supply a timed irrigation system from the
butt which switched to the mains if the water ran out?


Yes at some cost. How much water and money will you save doing this? How
much will it all cost?

Just had a brainwave... Would it be possible to top up the water butt
from the mains?

Of course. But much cheaper to just connect the mains to the irrigation
system and forget about the butt and the pump.

I am not saying that saving water is a bad thing but at the scale of a water
butt (200 l ?) you are paying lots of capital costs and getting little
return. You would be doing this for ideological reasons probably not for
saving money.

Do your sums first.

David