In reply to Trevor ) who wrote this in
, I, Marvo, say :

Is there a seep hose available that will work with water butts - i.e.
low pressure?

I have three full barrels and it would be useful to let this go into
my polytunnel ahead of rain.

The small bore hose that you get for those automatic irrigation systems
works with water butts pressure, it also comes with sprinkly attachments
which you can place at intervals. You could even use the timer that comes
with the starter pack, the head of water on a butt at (say) three feet is
more than enough.

And it's cheap at the moment, because the southerners aren't allowed to use
it due to the hosepipe ban :-)