Staples memberships could save you more | Learn More
The 3M™ Aqua-Pure™ Whole House Scale Inhibition Replacement Water Treatment Cartridge AP431 for the AP430SS was designed to reduce scale build-up on hot water-using appliances such as water heaters (standard and tank-less), clothes washers and dishwashing machines, and on plumbing fixtures like faucets, pipes, and shower heads. The AP431 is as easy to change-out as a light bulb. Scale inhibition helps protect pipes from corrosion. Contains polyphosphates to bind calcium and magnesium hardness minerals, preventing them from precipitating out (or becoming a solid) and building up on metallic surfaces such as water heaters and plumbing fixtures like faucets, pipes and shower heads.