My TDS is high 76 coming out of my membrane. I tried flushing and after 20 minutes it goes down to 20. So I need a membrane. Is there a place local that sells them for a good price ? Would a boost pump make my ro filters last longer ?
Aqua FX recommends to change the membrane when less than 90% reduction rate is happening. You are just over that number which should be 16.5 in your case.
Actually you should change it anytime its out of range weather its a .5% or 1% or 8% which they are recommending if I am reading this correct otherwise you are just depleting your DI at a faster than you need to rate which = inefficiency
Most DOW membranes have a 98% rejection rate so if its more than 2% = change it............. don't wait for it to be another 6% out of range