RO PPM 5 Before 2 filter DI

BobL

Member
I have a 5-stage RO system. 3 Canisters with typical filters and 2 DI canisters. Getting 3-5 PPM TDS on an inline before the DI filters. Haven't used or tested the DI filters yet. Fixing too! Can I expect them to bring the PPM to zero?

Thanks
 
3-5 after the membrane isn’t bad at all. Mine typically runs about 6-8. If you were getting the 3-5 after the DI, that would be a bit different. The RO membrane won’t remove all the impurities, that’s why we run the DI after the RO.
 
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