A drop in water flow usually indicates it's time to replace the filter. The Xiao Yijiang technician team has compiled the standard replacement cycles for each filter stage: Common Filter Replacement Cycles: - PP Cotton Filter (Stage 1): 3-6 months; removes sediment and rust - Granular Activated Carbon Filter (Stage 2): 6-12 months; adsorbs residual chlorine and odors - Compressed Activated Carbon Filter (Stage 3): 6-12 months; further purification - RO Reverse Osmosis Membrane (Stage 4): 18-36 months; removes heavy metals and bacteria - Post-Carbon Filter (Stage 5): 12-18 months; improves taste Troubleshooting Low Water Flow: 1. Ensure the inlet valve is fully open 2. Check each filter stage for clogging 3. Use a TDS pen to test output water quality if the RO membrane is suspected to be blocked 4. An abnormal waste-water ratio may indicate the RO membrane needs replacing Buying Recommendations: - Choose filters that match your machine's specifications - Look for NSF certification and water-related permits - Avoid cheap, unbranded products Xiao Yijiang provides filter replacement and whole-unit repair services for all brands of water purifiers. Genuine filters are guaranteed. Call our appointment hotline at 400-1060-908.
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