The 3M Aqua-Pure AP430SS system installs BEFORE the hot water heater in order to filter the water before it reaches the hot water heater.
If you've got a 3M Aqua-Pure AP430 or AP430-SS Hot Water Filter System, and you need some replacement filters, look no further. The AP431 is the
3M Cuno Aqua-Pure Ap431 Hot Water Heater Scale Inhibitor Filter
3M™ Aqua-Pure™ Whole House Scale Inhibition Water Treatment System AP430SS, AP43011, Scale, 6/Case
Aqua Pure Scale Inhibition System
Helps protect piping system from corrosion. Suitable for drinking and cooking water and all food application. Easy to install and change-out cartridge.
3M Aqua-Pure Whole House Scale Inhibition Inline Water System AP430SS, Helps
Benefits of a Whole-House Scale Inhibition Water Treatment System - SaniWater
6 Pack Cartridge Fits 3M Aqua-Pure AP431, KleenWater KW431 AP430SS by AQUA CREST
Aqua Pure Scale Inhibition System
3M™ Aqua-Pure™ Whole House Scale Inhibition Replacement Water Treatment Cartridge AP431
PUREUP AP431 Replacement Filter Compatible with Sweden
Aqua Pure Scale Filter Change and SharkBite Fitting Update