I have recently changed my Reverse Osmosis membrane and after a few days of it running, the TDS (which was initially very high) has dropped to 47. Is the issue a faulty membrane, or could it be something else? It is a 50g unit and both of its cartridges are new. The TDS of my tap water is roughly 330. The flow restrictor valve is set at about 45 degrees.
Kind Regards, Giovanni
- The incoming water pressure is low and not putting enough pressure on the membrane, typical we are looking at a mains water pressure of 50 psi and up to around 80 PSI for best performance. Low water pressure can lead to TDS creep across the membrane and lack lustre efficacy. We would expect a TDS of your product water to be between 17.5 – 8ppm when tested on a freshly calibrated TDS meter if the unit is operating efficiently. This would be pre an Di resin stage if installed.