[andy east sussex]

thinking I had problem with membrane maybe its the tds ready as the handheld one shows when put water in it after ro 35ppm but I have a inline tds also which isn't fitted and the end are in john guest fittings and that showing 10ppm so Christ know what's wrong and which one is right guess main thing all windows are still coming up great but concerned as maybe eating up the mixed bed resin

[dannymack]

I know what you mean I got X2 inline TDS readers and a hand held one and they are all different by around 5 Tds very strange 😁