Higher TDS after new DI Resin?

[BigJohnny]

Replaced my sediment filter, carbon block, and di resin. I'm getting 2 tds after the membrane but 8 tds after the di, thoughts?

 

[stunreefer Verified Sponsor]

Are you testing TDS with an inline meter or a handheld meter?

 

[twilliard]

Make sure the system gets flushed well
@AZDesertRat

 

[AZDesertRat]

Did you flush the first half gallon or so to the drain before taking the TDS reading? New resin needs to rinse up as it is shipped in a wetting solution to keep it fresh.

 

[BigJohnny]

So I ran it for about 30 mins last night and that still didn't change the results. Just tried it again and now I'm getting 0 tds, interesting. Maybe it just needed extra time to soak in or maybe there was some tds creep caught in the DI (never heard of that but who knows). I had tried flushing last night several times to no avail, but flushing is for the membrane anyway which was working fine. Regardless, I'm good now! Thanks

 

[AZDesertRat]

Flush kits don't do anything for the membrane and DI, a DI bypass valve is what you need to get rid of TDS creep and to extend the life of the DI resin. Flush kits are on the waste side, TDS creep is on the treated side.

 

[BigJohnny]

Flush kits don't do anything for the membrane and DI, a DI bypass valve is what you need to get rid of TDS creep and to extend the life of the DI resin. Flush kits are on the waste side, TDS creep is on the treated side.

Not quite sure what flush kits your referring to, but mine is specifically for flushing and prolonging the useful life of the membrane. My point was that flushing the membrane wouldn't help the DI, and since my TDS was going up only after the DI stage, that's where the problem was. Luckily all works fine now so doesn't matter anyway!

 

[AZDesertRat]

Again, flush kits are on the waste side and do little except give you a warm fuzzy feeling and lighten your wallet. A DI bypass though is useful and costs maybe $6-$8 at most for a 1/4" tee and ball valve you install between the RO membrane and the DI filter. Open the bypass when you turn the system on and flush the first few ounces to the drain and close it when the RO only TDS drops to its normal range meaning the TDS creep (on the treated side of the membrane not the waste side) has passed.
You could run a flush kit all day long and the RO TDS isn't going to drop. Open a DI bypass and the TDS drops right away since it ison the treated side and will make its way to the DI resin if not flushed out. Two very different things.

 

[BigJohnny]

Again, flush kits are on the waste side and do little except give you a warm fuzzy feeling and lighten your wallet. A DI bypass though is useful and costs maybe $6-$8 at most for a 1/4" tee and ball valve you install between the RO membrane and the DI filter. Open the bypass when you turn the system on and flush the first few ounces to the drain and close it when the RO only TDS drops to its normal range meaning the TDS creep (on the treated side of the membrane not the waste side) has passed.
You could run a flush kit all day long and the RO TDS isn't going to drop. Open a DI bypass and the TDS drops right away since it ison the treated side and will make its way to the DI resin if not flushed out. Two very different things.

First of all, I think your a little confused, i never said anything about an RO flush kit helping TDS creep, i said it prolongs the life of the membrane (anything you state otherwise is an opinion and contrary to popular belief). A DI bypass prevents TDS creep from reaching your DI. One is to prolong your membrane, one is to prolong your DI resin. They have two completely different purposes. second of all, i didnt create this thread to argue with someone over an offshoot of a thread for a problem which has been resolved. Im moving on.

MOD PLEASE CLOSE THREAD

 

[AZDesertRat]

You mention "popular belief", it is just that with no documented proven data to back it up. Find one single independent published report showing otherwise. Having been in the water treatment industry for over 40 years I have a pretty good understanding of how and what works.

 

[redfishbluefish]

Darn, I wish I knew where to buy a $6 - $8 tee/valve!!! Mine cost $19.99 at BRS.

But without question, an effective way to extend the life of your DI resin.

 

[BigJohnny]

You mention "popular belief", it is just that with no documented proven data to back it up. Find one single independent published report showing otherwise. Having been in the water treatment industry for over 40 years I have a pretty good understanding of how and what works.

not reading that. Thought I was pretty clear, not here to argue about some random offshoot.

MOD PLEASE CLOSE THREAD

 

[twilliard]

I am not seeing random offshoots here just facts about proper ways to flush for specific purposes.
Great information here and thank you @AZDesertRat for your information

 

[BigJohnny]

I am not seeing random offshoots here just facts about proper ways to flush for specific purposes.
Great information here and thank you @AZDesertRat for your information

Cool man I don't care

 

[BigJohnny]

MOD PLEASE CLOSE THREAD