3M Aqua-Pure Whole House Scale Inhibition Replacement Water Treatment Cartridge

The 3M™ Aqua-Pure™ Whole House Scale Inhibition Replacement Water Treatment Cartridge AP431 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.