On 09/05/2021 10:15, Chris J Dixon wrote:
David wrote:

Wearing my "long time since I did this" hat.

I have a connector kit to join two water butts.

I take it you have ruled out a permanent syphon between the two?

That is how I do mine. Small lead weights on each end of the pipe.

Getting it started the first time is fun and then every decade or so
after a build up of sludge in the bottom. Weights best off about 6" back
from the end of the pipe. I used clear 1cm silicone piping for mine.

--
Regards,
Martin Brown