Softening resin filter regeneration method to use according to local water quality renewable 1-2 times a month to extend the softening resin filter life. 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 . softening resin filter regeneration principle: with salt ( sodium chloride ) solution of sodium ions into the replacement filter elements 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. 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 Function: Filter water impurities Usage location: Internal filter of water purifie Colour:As Shown Material:plastic Package Contents: 2 * Water Purifier Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.