On 26/07/2013 12:28, Tim Watts wrote:
On Friday 26 July 2013 09:57 Broadback wrote in uk.rec.gardening:

I have set up three rainwater butts, linked at the bottom. works quite
well but from time to time develops a leak in one joint or another. I
have been looking at larger storage tanks, but they seem ridiculously
expensive. Any suggestions?

Make better joints.

What fittings and pipe are you using now?

The ones normally supplied with butts, using flexible piping.