posted 12 years ago
20 foot of lift doesn't sound like much--but it is more than most sump pumps can handle.
It takes a HUGE volume pump to keep up with a modest roof.
Cheapest way IMO, is to build 2 cisterns--big one gravity fed from the roof and a small one up high to drive the irrigation. Then a small pump can pump up to the high tank only when you want to water. An IBC tote is enough to run a lot of drip line
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