My PPM is not reading zero, what should I do?

If your PPM (parts per million) reading is not showing zero, this typically indicates that the water purification system is not filtering out all the dissolved solids effectively. Here are some steps to troubleshoot the issue:

1. Check the Resin and Filters: Ensure that the resin in your DI (deionisation) vessel is not exhausted. Over time, the resin can lose effectiveness, causing higher PPM readings. You may need to replace the resin if it's old or used up. Similarly, check any pre-filters (like carbon or sediment filters) for clogging or expiration.

2. Inspect the RO (Reverse Osmosis) Membrane: If your system has an RO membrane, ensure it's still in good condition. RO membranes usually need replacement every 2-3 years, depending on usage. A degraded membrane may not effectively filter out impurities, leading to higher PPM readings.

3. Check for Bypasses or Leaks: Look over all connections, hoses, and fittings to ensure there are no leaks or bypasses allowing untreated water to mix with treated water. Even a small leak or improperly connected fitting can affect the reading.

4. Flush the System: Sometimes, flushing the RO membrane can help restore its effectiveness if it’s slightly clogged. Refer to your user manual for instructions on performing a flush, as it varies by model.

5. Calibrate or Reset the TDS Meter: If the above steps don't solve the issue, the TDS (total dissolved solids) meter might need calibration. Some TDS meters require periodic calibration to maintain accuracy.

If you've gone through these steps and the PPM still reads above zero, please let me know, and we can look into other possibilities. Alternatively, if you'd like, I can open a support ticket for further assistance.