amcvay1979
02/03/2016, 11:27 AM
I posted a thread a few months back that my RO was reading high TDS after the membrane and causing my DI to exhaust quickly. Today I checked my DI reading and it was over 20ppm so I thought I should check the membrane TDS.
It too was over 20ppm. This is a brand new Filmtec membrane less than 3 months old. When I installed it the TDS were back to 2 and the output was 2 gallons of pure water and 5 gallons of waste. I made sure to install the correct flow restrictor for the membrane size when I changed membranes.
The only thing I can think of, and I brought this up with my last thread was that the RO was being fed with water after a whole house Whirlpool self regenerating filter and a Whirlpool water softener. Several people told me this was fine and they run an RO system this way as well. Other people said softeners kill membranes, so I don't know what's going on. TDS in to my home is only 120 or so, it's city water so it's not terrible.
Just wondering if going from 0 to 20 ppm TDS in a few months is an indication of spent carbon blocks or if I've fried another membrane? Input pressure is 60 or 80, can't remember, I can look again. Temp is obviously cold for midwest winter but nothing out of the ordinary temp.
Should I remove the flow restrictor and do a manual membrane flush? Is that the correct way to do a manual flush?
It too was over 20ppm. This is a brand new Filmtec membrane less than 3 months old. When I installed it the TDS were back to 2 and the output was 2 gallons of pure water and 5 gallons of waste. I made sure to install the correct flow restrictor for the membrane size when I changed membranes.
The only thing I can think of, and I brought this up with my last thread was that the RO was being fed with water after a whole house Whirlpool self regenerating filter and a Whirlpool water softener. Several people told me this was fine and they run an RO system this way as well. Other people said softeners kill membranes, so I don't know what's going on. TDS in to my home is only 120 or so, it's city water so it's not terrible.
Just wondering if going from 0 to 20 ppm TDS in a few months is an indication of spent carbon blocks or if I've fried another membrane? Input pressure is 60 or 80, can't remember, I can look again. Temp is obviously cold for midwest winter but nothing out of the ordinary temp.
Should I remove the flow restrictor and do a manual membrane flush? Is that the correct way to do a manual flush?