Why sand and carbon filters underperform: 5 signs and solutions

1. Outlet looks like inlet — saturated or channelled bed.
2. High ΔP after backwash — insufficient backwash flow or clogged media.
3. Carbon older than a year — exhausted adsorption.
4. Media in the outlet — broken nozzles.
5. Odour and stains return on well water — oxidation and catalytic media needed.

Solutions: media replacement, backwash re-tuning, analysis-based media and scheduled maintenance.