Main features: reduced by ion exchange water hardness scale removal ; make hard water into soft water to avoid drinking hard water body with stones . Replacement cycle :6- 12 months ( resin can be regenerated prolong life ) Softening resin filter regeneration method to use 1. according to local water quality renewable 1-2 times a month to extend the softening resin filter life. 2. softening resin filter regeneration method: 10-20 % resin filter is placed in a solution of sodium chloride ( table salt or industrial salt ) soak 8-12 hours ( softening resin to be fully immersed in the solution ) , and then soaked in water for 2 hours ; into the water purifier , rinse 5-10 minutes, you can use . 3. softening resin filter regeneration principle: with salt ( sodium chloride ) solution of sodium ions into the replacement filter element replacement of calcium and magnesium ions into the solution and then , this principle is the process of softening resin filter anti filtering , can play the role of the filter regeneration. 4. softening resin filter service life , under the premise of the proper use and regeneration of the filter , each filter can be used 12-15 months. Specification:10 Inches~20 Inches Material:Resin Package Includes: 1 Piece Water Filter