Please correct me if I’m wrong here, but that’s nonsense.. by the time water exits the RO membrane there should be no ammonia at all hitting the di resin. If that is truly the case there is a setup problem.
My guess is with the high output rates and high pressure pumps would be not enough contact time. Either way, ammonia / chloramine issues would be resolved with carbon. Some carbon works better than other, additional cartridges increase contact time and contamination removal.
You are wrong see above [emoji6][emoji4]
If your assumption was correct which I know it's not - we would've saved hundreds if not thousands by not changing so many chloramine/DI resin filters.
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