We now offer a diverter system. With this system there is no need to bring your downspout over to the top of the barrel nor is there any need for a separate overflow, instead the rain water runs through a diverter and enters the barrel through an inlet at the back of the rain barrel, once the barrel is full the water simply overflows back through the diverter and back into your downspout where it exits at the downspouts original outlet point. Another benefit to this system is that there is no longer any need to cut a hole in the top of the barrel. When the summer season is over the diverter can be removed and the cover plate installed allowing water to flow directly through the downspout again.
Note: Rain barrel prices include the diverter system.