I've just come into possession of two 120L water butts to connect up to my shed on my allotment plot, but as it is a pent roof I need to connect the water butts together as there is only one downpipe.
From what I have read there are two methods of linking them:-
- Connect at the top so the first overflows into the second when full.
- Connect at the bottom so the water is evenly distributed between the two containers.
What are the benefits and downsides of these methods and how best to connect them?