I have the more expensive version of this system (about double the cost). With the one that Shep has listed, it uses about 5 gallons of water to make 1 gallon of filtered water. If you buy the more expensive version with the pump (a “permeate pump”) it supposedly wastes about 80% less water.
I have the more expensive version of this system (about double the cost). With the one that Shep has listed, it uses…