3M Aqua-Pure AP431 Hot Water Heater Scale Inhibitor Filter

Price $36.99
Availability: In stock
Choose a quantity
  • 1 Filter $36.99  
  • 3 Filters Price $34.80 each
  • 6 Filters Price $33.29 each
The 3M Aqua-Pure AP431 Hot Water System Scale Inhibitor Replacement Cartridge will extend the life of your hot water heater by stopping scale buildup and corrosion. The filter not only increases the efficiency of your hot water systems so they run cleaner, but it also saves money on maintenance costs. The 3M Aqua-Pure AP431 hot water system protector filter cartridge is designed for use with the 3M Aqua-Pure AP430 Hot Water System.
Package Qty 1
Used In Brands Aqua-Pure
Manufacturer's Id AP431
UPC 051128889886
Advertised Size (in) 10-3/4 x 2-3/4
Actual Size (in) 8 3/4 inches (length) x 2 1/2 inches (outside diameter)
Actual Size (cm) 22.23 x 6.35
Primary Filter Media Scale Reduction media
Filter Life (gallons) 1500
Filter Life (liters) 5677.51
Filter Life (months) 6 months
Operating Pressure (psi) 0 - 125
Operating Temperature (°F) 40 - 100
Operating Temperature (°C) 4.4 - 37.8
Flow Rate (gpm) 10
Flow Rate (lpm) 37.85
Fitting Type NPT
Fitting Size (inches) 3/4 inch
Primary Filter Media Scale Reduction media

Reduced Contaminants

The AQUAPURE-AP431 reduces the following contaminants:

  • Hard Scale
  • Rust and Corrosion

The AQUAPURE-AP431 is comparable with the following part numbers

3P777 40161502
AP430 AP430SS
AP430-SS AP431
AP-431 AP43110
AP431-10 AP-431-10

The AQUAPURE-AP431 fits the following model numbers


Installation Guide

User Guide


  1. The 3M Aqua-Pure AP431 hot water system cartridge needs to be replaced every 3-6 months. The cartridge may need to be replaced sooner depending on your water quality and your water usage
  2. Shut off incoming water supply
  3. Open nearest hot water outlet for 10 seconds to relieve pressure
  4. Remove cartridge by unscrewing counterclockwise from tee
  5. Replace with new AP431 cartridge
  6. Turn on water supply

Reset Instructions