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Cartridge Filter Kit includes one replacement filter and one replacement check valve for the SoClean 2. The cartridge filter converts activated oxygen back to regular oxygen as it leaves the SoClean 2 chamber. Check valve prevents water from your CPAP from damaging your CPAP electronics. Filter and check valve should be replaced every six months.
Filter cartridge and check valve kit only.
The "new design" SoClean filter cartridge (particularly the check valve, the transparent tube) is made thinner than the original. This new design is compatible with the SoClean 2. To ensure a snug fit, some may need to snip off a small piece of the black tube with the wider diameter of the old check valve and insert the new one in.