"WaltA" wrote in message
...


Not a problem I think,
There is a little pressure, a few (decreasing) feet of head, enough to
cause the water to leak out gradually. You dont want it all to be gone
in a day do you ?

Not a problem - the overflow is from the TOP of the waterbutt so only excess
water once the butt is filled (and during rainfall) will journey towards the
flower bed).

When it's not raining, the butt will happily sit full. When it rains, the
butt will fill or the overflow will spring into action (if butt is already
full).

Kroma