Why is it important to know the change in pressure accross the RO membrane? What can pre and post membrane pressure tell you that a conductivity/TDS/percent rejection meter cannot?

Pre & Post pressures tells you the condition of your membranes.(just a one-way thought)

quote:

Originally posted by Lorna G:
Why is it important to know the change in pressure accross the RO membrane? What can pre and post membrane pressure tell you that a conductivity/TDS/percent rejection meter cannot?

It is Important to know these pressure to use them as a trouble shooting tool. It can tell you when it is time to clean or change your membranes. As the membranes get older and/or need cleaned the pressures will rise but the quality may not change.

It's important to know and regularly monitor all the pressures and TDS's, and whatever else you can check on in your water system; if all is well you shouldn't see any large unexplained variations from day to day. If you do see a sudden change ( or a change over a longer time ) that will usually be your first indication that something is wrong, or that something is going wrong, and you generally won't get caught completely by surprise if one or more components stops working.