- Joined
- Aug 16, 2018
- Messages
- 657
- Reaction score
- 377
Lately the TDS on my dual membrane setup has been creeping up and chewing through Di resin. TDS at the tap is 60 but still 40 after both membranes. The filters were due to be replaced so I did that and cleaned everything. Testing the first membrane alone I get 37 on clean output and 157 on waste. On the second membrane I got 5 from the clean output. I didn't bother measuring the waste as I could see something is wrong with the first membrane.
I don't know how old the membrane is as I bought the system used but could a bad membrane be leaching TDS back out like in this case?
I don't know how old the membrane is as I bought the system used but could a bad membrane be leaching TDS back out like in this case?