After lots of iterations, we still haven’t got supplying water to the butt at the far end of the garden working well. The pipe overflow that ensures any excess rainwater gets to the canal without slowly draining all the way through the garden and my diverter can reduce the rate at which the first water butts get fed but I think the run is too long for a regular hosepipe and the far one wasn’t getting filled even in the wet months earlier this year.

Today we implemented a more radical solution and shifted that large butt up next to the polytunnel near the other ones. We’ve still got figure out how we are going to link the two together but the job should be a lot easier now that there is about a 50cm gap rather than a 15m one between them.