KSAT.com:
The heart of his invention is Sears Kenmore 70-pint dehumidifier.
Condensed water is further purified and sterilized with filters and ultraviolet light.
It takes about three days to make 40 gallons of ultra-pure water that are stored in a food-grade plastic barrel.
The parts to the machine cost around $700 but he can sell you his pre-made Big Dipper for $800.