AUTHENTIC FILTER KIT: This genuine part for SoClean 2 machines includes one replacement filter cartridge and check valve assembly | GUARANTEED COMPATIBILITY: Kit is suitable for all SoClean machines with SC1200 serial numbers | RECOMMENDED 6 MONTH REPLACEMENT: To ensure optimum protection and effectiveness of your SoClean 2 machine it is advised to replace the filter and valve every 6 months | QUICK AND EASY INSTALLATION: Removing the old filter and replacing with the new one is simple; no need to disassemble the unit | IMPORTANT: FILTER KITS ON AMAZON MUST BE PURCHASED FROM SoClean TO ENSURE AUTHENTICITY. Please check "sold by" SoClean before making your purchase. Authentic SoClean filters contain technology required for safe use of the SoClean device. Damage caused by an inauthentic filter is not covered by SoClean 2 warranty.