PDA

View Full Version : RO/DI Question


Troy F
06-21-2003, 02:14 AM
How often do those of you with an RO/DI change the carbon and prefilter?

Chad
06-21-2003, 02:31 AM
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
06-21-2003, 02:49 AM
This may be a dumb question, but do you have to change the RO membrane often or not at all?

Chad
06-21-2003, 02:53 AM
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
06-21-2003, 04:20 AM
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
06-21-2003, 04:56 AM
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
06-21-2003, 06:58 AM
Replace my Prefilter and carbon at 6 month intervals.

Chad
06-21-2003, 02:41 PM
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
06-21-2003, 03:08 PM
Nope, just high algae. For $5 and $8 bucks, it's no big deal to change them.

StirCrazy
06-21-2003, 03:24 PM
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

Aquattro
06-21-2003, 03:32 PM
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

You're so smart Steve. :biggrin:

robbyville
06-21-2003, 07:05 PM
Ok, this may be an even nuttier question but...

which of the filters is the RO membrane? I have a 4 stage 50gpd from Jayson. Are the three large cannisters the filters that I would change every 6 months or so, or is it the cannister mounted to the top of the device?

Rob

Chad
06-21-2003, 08:01 PM
Ok, this may be an even nuttier question but...

which of the filters is the RO membrane? I have a 4 stage 50gpd from Jayson. Are the three large cannisters the filters that I would change every 6 months or so, or is it the cannister mounted to the top of the device?

Rob

The one mounted on the top is usualy the RO membrane...

Troy F
06-21-2003, 11:03 PM
Thanks for all of your input.