The booster pump included with this tankless reverse osmosis system requires electricity but helps to maximize the efficiency of the system. It can achieve up to a 1:1 ratio of purified to wastewater. However, in real-world use, some people found that wastewater was more like 2 gallons for every 1 gallon of purified water produced. iSprings points out that many factors affect this efficiency rating, so some variance in results is to be expected.
The first part of the purification tag team must eliminate microorganisms, like harmful bacteria and parasites. There are a handful of tried and true methods for doing this. The most familiar is boiling. Simply bringing water up to its boiling point of 212 degrees Fahrenheit will kill almost all microorganisms, so just a few minutes of boiling will do the job.