Then, the system drains at the bottom of the hole, while our drinking water is supplied from a depth of 140 feet and ne???er the twain shall meet, I hope.Using one of the two name brands (ClimateMaster or Water Furnace), we then limit our cost for the geothermal to the well (ours is costing around 8500k including water well for 5000 which we had to get anyway), plus a backup dry well (leaching fie