SoClean 2 & SoClean 2 Go Cartridge Filter Kit
PN: 633-PN1207

This Cartridge Filter Kit includes one replacement filter with O-ring attached and one replacement check valve for the SoClean 2 and SoClean 2 GO machines.
The filter and check valve should be replaced every six months. 

The Cartridge Filter converts activated oxygen back to regular oxygen as it leaves the SoClean 2 chamber. The check valve prevents water from your CPAP from damaging your CPAP electronics.