This was the only diverter I could find that has the overflow go into a hose outlet as we have no drain, it goes down the garden via a hose to another ground drain. Excellent from that point of view. The issue was that it was almost impossible to get the 25mm drain hose sold by Rainwater Terrace onto the outlet, I was having to work it so hard the glue that holds the outlet into the diverter body cracked. Hopefully it won't leak. Basically the barbs are too wide or the hose is too small. This was with soaking the hose in boiling water too. The 19mm water butt inlet part fitted fine into the inlet hose though.
If you do not have a drain where you would like to site your waterbutt, this item will enable you to add a downpipe to the existing gutter.
It's well designed & made.
I have the overflow running in an 8metre 25mm pipe to a drain, hidden under some gravel.
After setting up the 227lt butt it was almost full after 3hours of very heavy rain.
Compacted transition piece from guttering to barrel.👍