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Hi I have an off-the-grid self-sustainable-type home. I am currently pressurizing my water mains with a pump from harvested rainwater tanks. Nothing too exotic: when one opens a tap the pressure-drop switches on the pump and water flows. The issue: since my electricity is from a solar-fed...

Hi folks I have installed a solar heated geyser. There is a flat panel collector that is connected to the geyser via a small recurculating pump controlled by a geyser max "computer". Further pertinent info: I have an off-the-grid home so there's no water-mains. Instead the home is fed...