In article ,
Mr Lawes writes:

I've just bought a water butt, stand & diverter from one of those
water authority sponsored events.

Due to lack of space at the down-pipe, I need to put said butt on the
other side of a path from the down-pipe.

Has anyone else done this?
How far up the down-pipe do I need to put the rain diverter to give
the water enough gravity?

You have to put it exactly level with the high water level in the
water butt.

I guess the feed pipe then would run alongside the down-pipe, under
the path, and back up & into the water butt.

Don't know how well that will work. I suspect it will get silted up.
At least make it easily removable for flushing through. You might as
well connect it near the bottom of the water butt, in which case if
it's a flexible hose, you could temporarily disconnect from the
downpipe end to reverse flush it using the water in the butt.

--
Andrew Gabriel