View Full Version : when to replace membrane?

12/16/2007, 04:13 PM
im using the typhoon III for a couple of years now...i realize the membrane lasts 3-5 years but is there anyway to test that it is still good?

12/16/2007, 04:14 PM
I'm wondering the same thing

12/16/2007, 04:37 PM
Just test your TDS out of the membrane. If I'm not mistaken, it should be no more than 10% (or maybe it was 5%?) of your TDS going in. If its more, you have a problem somewhere and it could be your membrane is finished. Also, if you seem to be going through DI resin quickly, thats obviously a sign of high TDS going into the resin which could mean the same thing.