Keep soft, cleaner water flowing in your home with the easy-to-install Kenmore 40,000 grain water softener. This water softener system is NSF International Certified to reduce hard water minerals, barium and radium in your home's water. Built with intuitive IntelliSoft® Technology that adjusts to your water needs, saving you money in salt, water and energy bills. This system will effectively reduce stains, scale buildup, and clear water iron. You'll notice positive changes with soft water, such as softer hair and skin, cleaner clothing, linens and dishes, and better appliance performance and plumbing. This whole home water softener system is easy to install and program. Ideal for households of 1-5 persons. Discover the total difference a Kenmore system can make throughout your home.The Kenmore 420 Model has the same height (floor to inlet-outlet) and same 3/4” valve size as these older Kenmore models: 625.340700, 625.340752, 625.342802, 625.348320, 625.348321, 625.348420, 625.348470, 625.348490, 625.348471, 625.348491, 625.348541, 625.348551, 625.348570 ,625.348590, 625.348571, 625.348591, 625.348751, 625.3488003, 625.348812, 625.348832, 625.383000, 625.383001, 625.383060, 625.383500, 625.383560, 625.386200, 625.388100, 625.388150, 625.388160, 625.388170, 625.388180, 625.388200, 625.388250 ,625.388251, 625.388260, 625.388270, 625.388280, 625.3483400, 625.3483500, 625.3484400, 625.3484500, 625.3485400, 625.3485500, 625.348732.The following older Kenmore models have the same 3/4" valve size, but the height (floor to inlet-outlet) is shorter. Additional plumbing will be required to replace with the Kenmore 350 (41.5" height to inlet-outlet): 625.340400 (34"), 625.340500 (36-3/4"), 625.348460 (22.5"), 625.348512 (36.5"), 625.388110 (36.5"). NOTE: Due to variances in production and assembly, the Kenmore water softener valve height may vary by up to 1/2" from an existing water treatment system, including existing Kenmore models. This potential change in valve height will not affect system performance. Product color may vary from photo color.