Is this RO/DI information accurate?

KingTriton1

New member
I want to start off by saying I have little knowledge on how RODI's operate so Im looking for advice here.

Ph: 8.4
Alk: 8.4
TDS is 158 / 007/000

So I have a CSPDI 2:1 Automatic Flush 90-GPD RO/DI System - CSPDI-90-AF that started with a 98% rejection rate then after 200 gallons is produced it fell to 94%. I contacted Spectrapure they replaced the RO membrane and I purchased the filter, carbon, and DI. After I replaced this once again my rejection started off at 98% then after 200 gallons fell to 95%. So I called Spectrapure and was told that below 95% rejection is a non issue because my tap water was so low. I asked if chlorine would possibly be the cause of the RO membrane failure and was told that unless you can taste or smell chlorine then its not a problem. Is that accurate? I told the guy that my PH was at 8.4 and he said that PH has nothing to do with a possible Chloramine problem. Which I thought wasn't right as well. Im not trying to attack anybody here as I could be the one wrong, but really curious as to how this can be right. I was basically told to not worry about the sediment/carbon/ and ro rejection and to just focus on my DI and once this show 3 to change just the DI and nothing else. Is this information correct?

Thanks
 
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Well if that is correct as you report I am glad I do not have one of their units. 200 gallons wouldn't last me a month.
 
Ive always dealt with Jeremy who is amazing to work with, but unfortunately dealt with someone else in their technical division who kinda had a different approach maybe? Im really hoping I'm wrong here and the guy was right but just want to make sure I'm seeing things accurately.
 
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Interestingly enough they don't outright say they use Chloramines, however I suspect they do based on the measured TTHM and HAA5.

The Jungle Buddies ammonia test strips from Walmart will register if so. Test your waste water and tap.

Looks like the water is already pretty soft so I doubt that's the issue.
 
I think the best advice I can give for your membrane issue is call your local water filter suppliers and ask them. They will be most familiar with your water supply and filtering issues associated with it.

It may take a few calls but you really want to talk to the old rough around the edges guy/gal getting ready to retire :)
 
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