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Reverse osmosis replacement match

Waterdrop G3-series composite pre-filter

Part G3-N1CF for select Waterdrop filtration systems, including G3P400, WD-G3P400, G3P600, WD-G3P600, G3P800, WD-G3P800.

G3-N1CF fit summaryThis is the first-stage composite filter for compatible G3-series tankless systems. It does not replace the RO membrane or carbon-block stage.

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Compatible systems in our guide

G3P400WD-G3P400G3P600WD-G3P600G3P800WD-G3P800

Replacement guidance

Approximately every 6 months, subject to water quality and use. Multi-stage systems can require different schedules for different cartridges, so use the manual rather than replacing every stage automatically at the same time.

Checks before purchasing

  • Confirm the complete system model and stage count.
  • Compare the installed cartridge or membrane part number.
  • Confirm membrane capacity and connection style where applicable.
  • Review the manufacturer’s current compatibility information.

How this entry was verified

We used the named manufacturer’s replacement information as the primary compatibility reference. Retailer descriptions are a purchasing aid, not our source of truth.

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