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AP431 3M Aqua-Pure Inline Filter Replacement Cartridge

Price $41.99 List Price Price $59.99 Save 30%
Availability: In Stock - Free Shipping
Fits 3M Aqua-Pure AP430 and AP430-SS filtered hot water systems
  • Extends the life of your hot water system by reducing the build-up of scale and corrosion
  • quick change cartridge for easy filter replacements
  • inhibits scale build up and helps protect water using appliances
See more product details
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 replacement filter for your system.
Package Qty1
Used In BrandsAqua-Pure
Manufacturer's IdAP431
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 MediaScale 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 TypeNPT
Fitting Size (inches)3/4 inch
Primary Filter MediaScale 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