Catchment Water Pre-Filter

[Bob Orts]

Thanks Les, I spoke to the manufacture and they said the filters are based not on pressure but on gravity. So long as it's engineered to the downspout's output capacity with a large enough surface, there's no additional resistance on output to the catchment tank. It's a matter of making sure the drop is sufficient to keep a flow over the material and not backup into the gutter.

I guess I was curious why they weren't being used that much? I would think keeping as much foreign matter (solid and biological) out of the catchment tank would be better for the pumps and filters, as well as reducing biological growth.