I'll revisit pumping later, but before I forget I'll mention that I just noticed the RainPerfect solar-powered rain barrel pump. It has a battery to store the electric power from its solar cells, able to power pumping of up to 100 gallons at 13 psi.
The design requires that the control box with the battery and pump (actually I suspect the pump is inside the barrel) are to be mounted on top of a barrel, providing a compact package where the hose is attached. A pipe under the control box extends down into the barrel. This can be a problem for a single rain barrel with an opening on the top, but would work on a barrel with a hose intake or on one of the overflow barrels of a multibarrel installation.
More at: RainPerfect™ Rain Barrel Pump by Rule
The design requires that the control box with the battery and pump (actually I suspect the pump is inside the barrel) are to be mounted on top of a barrel, providing a compact package where the hose is attached. A pipe under the control box extends down into the barrel. This can be a problem for a single rain barrel with an opening on the top, but would work on a barrel with a hose intake or on one of the overflow barrels of a multibarrel installation.
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