RO/DI Question

[Troy F]

How often do those of you with an RO/DI change the carbon and prefilter?

[Chad]

Originally Posted by Troy F

How often do those of you with an RO/DI change the carbon and prefilter?

Well depends on how bad your water is. Could be 6 months, a year.. but I think 6 months is about right for our local water.

[Son Of Skyline]

This may be a dumb question, but do you have to change the RO membrane often or not at all?

[Chad]

Originally Posted by Son Of Skyline

This may be a dumb question, but do you have to change the RO membrane often or not at all?

The RO membrain should last about 3 years.. so long as you maintain it by flushing it every month. Its very expensive to buy another membrain.. Its practicaly the whole cost of the initial unit.

Chad

[EmilyB]

You can check your membrane by measuring the output after the RO and before the DI with a TDS meter. When it falls below 95% removal of the TDS in tap water, it is time to replace the membrane. We have done this once in two years, but we run a LOT of water.

Replacing cartridges also significantly depends on how much water you are running through the unit....

[Aquattro]

I replace my prefilter every 2 months and my carbon every three. If I notice pressure dropping below 75% normal, I replace more often.

[Canadian Man]

Replace my Prefilter and carbon at 6 month intervals.

[Chad]

Originally Posted by reef_raf

I replace my prefilter every 2 months and my carbon every three. If I notice pressure dropping below 75% normal, I replace more often.

Do you have really high TDS feed water there?? Thats crazy.

Chad

[Aquattro]

Nope, just high algae. For $5 and $8 bucks, it's no big deal to change them.

[StirCrazy]

what i do is put a 3.00 5 micron filter ahead of my 1 micron and my carbon. this catches the algae in our water and allows me to go 6 months or more on the more expensive ones.

Steve