I bought an RO system from a guy on eBay about a year ago that had prefilters rated at 6 months for 3 or 4 gallons a day.
I have only been using 2 or 3 gallons a week, and my source water is very high quality (24PPM), and the system is still producing water at 0PPM.
My question is how long can I continue to use the original prefilters under these conditions. *Will continuing to use it damage the membrane, or can it go longer? *Is there any way to test?
The guy I bought it from claims I should replace them but I wanted to get an opinion from someone who is not selling filters first.
Thanks, I really appreciate it.