I use a coral life. I wanted this one as I wanted it to be portable (somewhat). The coral life hooks up to any spigot and works great for me. I also collect the "waste water" to use in my garden. I fill up a 5 gallon jug with RO water to use, and collect the waste water in a 30 gallon garbage can. It was something I thought aboutwhen I was looking to purchase, so it should be considered. Also I have noticed RO units have gone way down in price in the two years it's been since I bought mine. Might be time to upgrade!