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Zoey’s Filter and Check Valve Kit includes 1 filter and 1 check valve. You’ll need to replace both items after 120 cycles, when Zoey displays three solid yellow lights.
The filter is necessary to keep activated oxygen from entering your household air, and the check valve traps condensation in the line—keeping your equipment free from water damage.
Though Zoey will remind you, we recommend purchasing the Filter and Check Valve Kit in advance of the replacement date!