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Aqua-Pure AP431 Compatible Filter for the AP430 System, Set of 3


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Three Cuno Aqua-Pure AP431 compatible replacement water filter cartridges. The KleenWater KW431 is an alternative replacement cartridge for the AP430 system.

  • Significantly prolongs the life and improves efficiency of traditional and tankless hot water systems.
  • Protects hot water systems from acidic corrosion and hard water scale.
  • Saves energy which is both environmentally friendly and economical.
  • Change cartridge every 6 months.

The KleenWater KW431 "hot water protector" cartridges is offered at an aggressive price with free USPS Priority Mail shipping. The active ingredient phosphate, sequesters or binds calcium & magnesium hardness minerals, preventing them from precipitating out of solution and building up on metallic surfaces. Phosphate also forms a thin protective layer on the pipe wall or metallic surface which helps to eliminate hardness build up and corrosion.


  • Model: KW431-QTY3

  • Model: KW431-QTY3

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