On Thu, 01 Apr 2010 10:37:00 +0100, Ed wrote:

So all I need to do then would be to connect a length of hose between
the two taps and leave then in the open position during rainy times so
that both barrels fill ?

Yep but it's a "thinking" solution. You have to remember to reconnect
the hose and open the taps or go out in the rain when you remember
you haven't done it... The average pastic water butt tap and tank
connector are not the most robust and normally don't take a hose
anyway...

I prefer non-thinking KISS stuff, the simple siphon is a good one.
Priming is the hard bit but sink all the hose into one butt so it
fills with water, block and end with your thumb, take that to the
other butt and submerge it before unblocking.


--
Cheers
Dave.