RO Water
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redfishbluefish
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RO/DI should be giving you 0 TDS.
What is the source of your raw water....well or city?
How old Is the DI resin?
What is your raw water TDS, and RO only TDS? Most membranes give you about a 98% reduction.
What is the source of your raw water....well or city?
How old Is the DI resin?
What is your raw water TDS, and RO only TDS? Most membranes give you about a 98% reduction.
Crabs McJones
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It's best to start out with 0tds water from the gate, less problems later on
VietExtender
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You should buy a booster pump for your rodi system. It’s recommended if the psi is under 40, you should invest in one. If your output is still greater than 0 tds, check your resin.
Randy Holmes-Farley
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Even without an RO entirely, a good functioning DI should drop tds to 0 ppm. [emoji3]
JoshH
Tank Status: Wet...ish, growing things....
Okay well I would have to say your first step should be a booster pump as mentioned above, especially with the Dual RO. It's hard to gauge whether or not which filters need replacing with low pressure coming in. But as Randy said above a good DI resin should still bring you to 0 it will just get exhausted exceptionally quick. So more than likely you atleast need to replace the DI resin.
JoshH
Tank Status: Wet...ish, growing things....
No problem, I mean if you're really unsure you could just go with the clean slate and order new everything. Which might be better down the road as you will know right off how old each filter is. Let me have a look on BRS and see...
JoshH
Tank Status: Wet...ish, growing things....
I don't have a well so I'm not sure if you have to worry about the chlorine/chloramine issue (Though I'm pretty sure it's not an issue). Standard kit would be this...
https://www.bulkreefsupply.com/4-stage-chlorine-voc-replacement-filter-kit.html
This does not include the actual RO membrane which is separate. I'd just pull one out and match the existing to one available at BRS and you should be good to go.
https://www.bulkreefsupply.com/4-stage-chlorine-voc-replacement-filter-kit.html
This does not include the actual RO membrane which is separate. I'd just pull one out and match the existing to one available at BRS and you should be good to go.
redfishbluefish
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I'm going to guess, with you on well water, that you have high carbon dioxide in your water.....which would burn through your DI resin within a very short period of time....possibly less than half an hour. Do a pH test on your raw water, first right from the tap, and then a day later after that water has sat. You can speed this up by putting a bubbler in that water. If you see the pH go from low pH to more neutral, it's a sign of CO2 in your water.
rkpetersen
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The "RO" as in reverse osmosis membrane, the heart of this system, is actually in each of those opaque white tubes. Some systems have 1 RO membrane, yours has 2. Depending on brand, age, and how they've been used, they could be ok or warrant replacing.
If you want to replace them, you will probably want something like this, although check against yours to make sure they're the same size.
The 3 clear cannisters below are sediment and carbon, which come before the RO membrane, and deionizing resin, which comes after.
Your sediment filter looks pretty dirty; this can also contribute to low pressure measured at the membrane.
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JoshH
Tank Status: Wet...ish, growing things....
Because you don't typically replace the RO membrane nearly as much as the other 3 medias the membranes are not included in the replacement kits. The difference between the 4,5,6 stage replacement kits centers around extra carbon/sediment/DI filters some systems have.
JMetaxas
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I would agree that you have a combination of poor feed pressure (33psi) and an exhausted DI cartridge.
My RO puts out 2 tds water then it goes into the DI cartridge. Net result is zero TDS.
I too am on a well, but know that the pressure at the RO never goes below 60psi and is often at 70psi. I also don't have dissolved Co2 . My last home was like yours. High Co2 (low pH) and poor pressure.
My RO puts out 2 tds water then it goes into the DI cartridge. Net result is zero TDS.
I too am on a well, but know that the pressure at the RO never goes below 60psi and is often at 70psi. I also don't have dissolved Co2 . My last home was like yours. High Co2 (low pH) and poor pressure.
