Hi There, need some experience in this area. For the last several months my r o systems starts running when the toilet is flushed. Sometimes when the well pump comes on, but lately especially when the toilet is flushed. Cause my ro system to run for quite a while.
There is no noticeable difference in water pressure in the house elsewhere, but this is ruining my filters which have just recently been changed, plus the tank pressure is reading at what it's supposed to. Anybody got any ideas? Thanks, Sue

My advice would be to fit or have fitted a pressure rated double non-return valve.