Aqua-Pure AP431 Water Filter Cartridge
Out of stock
The AP431 is a Water filter cartridge listed under the Aqua-Pure brand name. It installs into a compatible water system housing to treat water as it flows through your plumbing lines.
This filter is out of stock right now, so it cannot be added to the cart.
This cartridge helps protect your plumbing equipment and fixtures by treating incoming water. Over time, every filter cartridge reaches the end of its service life and must be replaced to keep water flowing smoothly.
Specifications
| Part number | AP431 |
|---|---|
| Brand | Aqua-Pure |
| Type | Water filter cartridge |
| Flow rate | 6 gpm |
| Height | Overall Height (Imperial) 9.21 in |
| Pressure | 125 psi |
| Width | Overall Width (Imperial) 2.4 in |
From the maker's and filter sellers' listings for this number. Compare with the label on your old filter.
What the Cartridge Does
A filter cartridge sits inside a system housing along your water supply. As water passes through, the cartridge treats the water before it travels to your fixtures or appliances.
A filter is built to handle a set amount of water, which is its rated capacity. After treating water over an extended period, the cartridge will slow down or lose effectiveness. Regular replacement keeps your water system operating as intended.
Understanding the AP431 Specifications
Every water system relies on specific measurements and ratings to function properly. Using a cartridge with the correct physical size and pressure tolerance ensures a proper seal inside the housing.
The AP431 cartridge features the following specifications:
- Flow rate: 6 gpm
- Height: Overall Height (Imperial) 9.21 in
- Pressure: 125 psi
- Width: Overall Width (Imperial) 2.4 in
How to Confirm a Match
Before replacing a cartridge, always confirm that the replacement matches your existing setup. Fit is matched by model: search the model of your system, the number on your old filter, or your fridge model.
Do not guess based on appearance alone. Many filter cartridges look similar from the outside but have different connections or dimensions that prevent a watertight fit.
Signs of Wear and Safe Replacement
Change your filter cartridge sooner if water flow slows down or if your filter light comes on. Many filter lights track time or water used rather than testing the water directly.
To replace the cartridge safely, follow these general steps:
- Turn off the water supply to the filter housing.
- Relieve remaining water pressure in the line by opening a nearby faucet.
- Open the housing, remove the spent cartridge, and place the new AP431 inside.
- Secure the housing and slowly turn the main water supply back on.
- Check carefully around the housing seams for any leaks.
- Run some water through the new filter before drinking to flush the system.
Read your old filter
- Locate the label printed on your existing filter cartridge.
- Check that the part number on the label reads AP431.
- Check the label on the side or front of your water system housing for the system model number.
- Verify the physical dimensions match Overall Height (Imperial) 9.21 in and Overall Width (Imperial) 2.4 in.
When to call a pro
If you notice persistent water leaks, cannot shut off your water supply, or feel unsure about completing plumbing work, stop and contact a licensed plumber.
Questions
What is the flow rate rating for the AP431?
The AP431 has a flow rate of 6 gpm. It is rated for a maximum pressure of 125 psi.
How do I confirm the AP431 fits my system?
Fit is matched by model. Check the model of your system, the number on your old filter, or your fridge model to make sure it calls for part number AP431.
What should I do before replacing this filter cartridge?
Always turn off the water supply before changing an under-sink, inline or whole house filter. Relieve line pressure before opening the filter housing.
Do I need to flush the AP431 after installation?
Yes. Run some water through a new filter before you drink it. Follow the flush steps on the box or the product page.
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