Check the listing for details. 3 Pack Cartridge Fits 3M Aqua-Pure AP431,KleenWater KW431 AP430SS by AQUA CREST. Color: White, Condition: New. Listed at 40.59 USD. Product Description · 💧【Protects water appliances】: AQUA CREST AP431 scale inhibitor cartridge adopts premium polyphosphates that can effectively prevent limescale and corrosion from building up, therefore, the corrosion and blockage of pipelines can be inhibited. The excellent filter material can protect and extend the service life of your water appliances, like heaters, dishwashers, etc. · 💧 【Prevents bursting】: Food-grade BPA-free plastic housing adopts excellent strength with latest advanced technology. Accurate design promises a precise fit without water leakage. AQUA CREST AP431 scale inhibitor ensures you a safe water usage experience. · 💧【Inhibits limescale】: Scale inhibitor provides you with stable and continuous filtered water without an obvious pressure drop. The flow rate is up to 10 gpm so it can meet the water demand for the whole house. Extends the service life of your water appliances. Accurate design Stable flow rate · 💧【 Long-lasting service life】: It's recommended that you replace the inhibitor every 6 months for effective scale inhibition, which will vary based on water conditions. · 💧 【Compatible models】: Replacement for 3M Aqua-Pure AP431, HF8-S, KleenWater KW431. Interchangeable with 3M Aqua-Pure AP430, AP430SS and SF18-S Scale Inhibition System.