Many Singapore households have invested in water filtration — from simple faucet filters to whole-house reverse osmosis systems. But a neglected filter doesn't just stop being effective; it can actually introduce more contaminants than it removes by harbouring bacteria.
Filter Replacement Schedule
| Filter Type | Replace Every | Notes |
|---|---|---|
| Sediment Pre-Filter | 3–6 months | More often if your water runs cloudy |
| Carbon Block Filter | 6–12 months | Removes chlorine, odours |
| Reverse Osmosis Membrane | 2–3 years | Test output water TDS annually |
| Post-Carbon Filter | 12 months | Final taste polishing stage |
| UV Lamp | 12 months | Even if still glowing — UV output degrades |
| Faucet-mount filter | 2–3 months | High flow rate depletes carbon quickly |
How to Tell If Your Filter Needs Replacing Now
- Water flow has noticeably reduced
- Tap water has returned to a chlorine or metallic taste
- Your TDS (total dissolved solids) meter shows increasing numbers post-filter
- It's been longer than the recommended period
Singapore Note: PUB water meets WHO standards at the source, but pipe conditions in older buildings can introduce sediment and trace metals. Filtration is especially valuable in older HDB estates built before 1990.
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