RO filter flush

cgdcinc · Dec 21, 2016

I was wondering about the life left in my RODI water filter. Especially the RO membrane. I bought a hand held TDS meter for 15 bucks on Amazon and figured I would test my water after filtering to see if my membrane and DI media was still working.I bought the filter kit in June 2016 when I first set up my reef tank. My RODI tested at 5. My tap water was 256. Bottled water I had was 50. Then I read about putting in a membrane flush that was simply two tees and a valve to by-pass your pressure regulator and would let water flush your RO membrane. This brought my TDS to zero after flushing. Prolongs spending 50 bucks to replace my filters! Just thought I would pass the info along. Anything that saves money in this hobby is great news!

JBradford · Dec 21, 2016

Thanks for the tip. I assume the flushed water goes down the waste line?

cromag27 · Dec 21, 2016

The manual flush will help prolong the life of the membrane, but the di filters are what create the 0 tds water we seek out. you should always let your unit runs couple minutes before you start collecting product water.