Thank you for the info. At least I now know that it is a possibility.
I want to use water from the water butt whilst i'm on holiday. I thought a drip feed hose from the water butt tap would be a good idea, but how do i attach it and regulate the flow?
I have been looking on the web for something that will allow me to attach a self watering drip hose to a rain water barrel to water my veggies whilst i'm on holiday. Does anyone have any experience of using something like this?