wah-zoh
12/01/2009, 08:31 AM
i am going to buy a RO DI unit later today. My question is what do i really need to pay attention to, or make sure it has. i have looked at 3 stage to 8 stage systems, they all say they do the same thing but price vary's greatly as the stages go up. do i need anything more than a 3 stage unit?