Gravity aided Catchment tank?

[mella l]

Thanks all and thanks Maud, I understand that a pump of some type will be needed after all, and a solar powered pump is intriguing. When I was contemplating this, I seem to have forgotten that in the prairies lands of old a wind mill provided this pumping power, much like a hand pump on a deep well does for underground water supply! Duh. [:I] But thanks to all for the food for thought, I love all the different takes on this, group pondering as it were! Mahalos plenty!

mella l