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I have a underground water tank and a above ground tank at home. The above ground rainwater tank overflows into the underground tank. When the above ground tank falls to 50%, I want to pump water from the underground tank to fill the above ground tank assuming that there is water in the underground tank to pump. I want some sort of indicator that will tell me the levels in my two tanks. At the moment I have a pump that I manually control. The underground tank is 6ft deep and the above ground tank is 7ft. Any ideas of the best and most cost effective way to go about this.
Thanks in advance
Thanks in advance