FITS ALL CLEO PRODUCTS: Compatible with CLEO Aromatherapy (SFA-520), Multiflow (SFM-419), Rain (SFR-519), SFU-1020, SFW-815 and SFU-717 range. Recommended for municipal/metro water with TDS levels upto 800 PPM and total hardness upto 350 PPM FOR BEST RESULTS: Reverse flush the cartridge under the flow of constant water for 3-5 minutes, every 60 days. The cleansing agents inside the filter need to be flushed regularly for optimum performance DOES NOT REDUCE TDS: Our water filters only reduce the effects of hard water and other impurities. TDS or total dissolved solids cannot be removed by our water filters. SFC-UW 100 HHC is recommended for hardness and does not filter chlorine. 2X LONG LIFE: SFC-UW 100 H comes with a long cartridge life of 25,000 liters or up to 6 months depending on usage and water quality. Use a low to medium flow rate for best results. CERTIFICATIONS & MEMBERSHIPS: KDF Technology, Member of the Global Water Quality Association and Indian Water Quality Association, NSF Certified Ingredients and a maximum rating of 3 Star by the IAPMO. Made for Indian water conditions with unique 4-Layer Filter and patented KDF Technology from USA Pick The Right Cartridge Municipal/Metro Cartridge for chlorine & hardness Borewell/Tanker Cartridge for high hardness, no chlorine