Ann Howard
Hello. There are no holes pre-drilled in the top of the water butts to fit an over flow pipe, this offers the flexibility to add the hole where required. Depending on the divertor used, will depend on the size of the hole; for example the Gutter Mate would be 25mm.
You could drill a secondary hole in the barrel for connecting a second water butt, or simply add a t-piece connector in the pipe from the diverter to the barrel which allows fitment of a second water butt without drilling a second hole. Thank you.
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