RO/DI Filter question

kube

kube

Member
Well, I'm loosing my mind but anyways.......i noticed today that RO membrane is running at about 88% rejection rate. So new one on order but my question lies with the 3 pre filters before it hits RO membrane....I replaced all three prefilters about a two months ago (quality filters for BRS) and ran maybe 300 gallons through them...water going in is 310 and after the three filters before the RO membrane its 305....does that sound right? thought it would knock it down a bit more
Kube
 
pezenfuego

pezenfuego

Active Member
Originally Posted by Kube
http:///forum/post/3238465
Well, I'm loosing my mind but anyways.......i noticed today that RO membrane is running at about 88% rejection rate. So new one on order but my question lies with the 3 pre filters before it hits RO membrane....I replaced all three prefilters about a two months ago (quality filters for BRS) and ran maybe 300 gallons through them...water going in is 310 and after the three filters before the RO membrane its 305....does that sound right? thought it would knock it down a bit more
Kube

It depends on your source water. By using softened water (water that runs through a water softener...duh), my prefilters don't do squat to lower the tds. By using well water, the tds drops quite a bit from the prefilters.
I don't know if that helps you or not, but I thought I'd share.
 
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