Hi everyone. Just discovered this Forum is working again. Cool. I was lost without it. Pretty new to WFP cleaning but getting there. What is Flush valve for Pn RO system and how does it work ? Think I heard it's to flush membranes and prolong life of them but not sure. How long and how often do I do this ? Help ! Thanks lads

Thanks so much as was well confused. I produce about 350 to 500 litres of pure per week. Tops only. My TDS started at 000ppm now crept up to 005 ppm. Only had system for a month. Will it just need a resi n change to bring it back to 000ppm. It won't be the Pre filters already will it ? How often do I need to change filters and membranes roughly ?

don't worry about pre filters for at least 3 months, i do them about every 6. i think ionics did a colour changing resin but don't think anything visibly obvious happens with tulsion- go off your tds. pre filters only cost about 13 quid, just get them from peter.