A salty taste indicates a problem. Do not drink it.
DIAGNOSIS: Membrane failure or incorrect rejection rate. Chloride ions are passing through.
FIX:
- Check the feed water TDS. If it's extremely high (>2000 mg/liter), the membrane may be overwhelmed.
- Verify the wastewater (drain) line is flowing freely. A clog increases pressure and reduces rejection.
- Test the product water TDS with a meter. Compare to feed water. Rejection should be 90-98%.
IF THAT DIDN'T WORK: The reverse osmosis membrane is likely spent or damaged. Replace it. Also check the pre-filters; a failed sediment filter can foul the membrane.
HEADS UP: Water with high chloride and sulfate content is corrosive and can damage plumbing fixtures. Identify and replace the faulty component immediately.