PUR PFM400H
PUR PLUS Horizontal Faucet Mount Water Filtration System User Manual
Brand: PUR | Model: PFM400H
Introduction
The PUR PLUS Horizontal Faucet Mount Water Filtration System is designed to provide superior water filtration directly from your kitchen or bathroom faucet. This system features a powerful 3-in-1 filtration technology that significantly reduces chemical and physical substances, including lead and microplastics, ensuring cleaner, better-tasting drinking water. It is engineered for ease of use with tool-free installation and an on/off lever for convenient access to filtered or unfiltered water.

Image: The PUR PLUS Horizontal Faucet Mount Water Filtration System in its chrome finish, attached to a faucet with water flowing.
Setup and Installation
The PUR PLUS Faucet Mount Water Filtration System is designed for quick and tool-free installation. It is compatible with most standard faucets that have visible, external aerators. Please ensure your faucet type is compatible before proceeding.
- Prepare Your Faucet: Unscrew and remove the existing aerator from your faucet. Ensure the faucet threads are clean and free of debris.
- Select the Correct Adapter: The system comes with various adapters to fit different faucet thread types. Identify the adapter that securely fits your faucet's threads.
- Attach the System: Thread the selected adapter onto your faucet. Then, align the PUR PLUS Faucet Mount Water Filtration System with the adapter and twist it securely into place. No tools are typically required for this step.
- Flush the Filter: Once installed, turn on the cold water and allow it to run through the filter for 5 minutes to flush out any carbon dust and prepare the filter for use.

Image: A visual guide demonstrating the simple, tool-free attachment process of the PUR faucet mount filter to a standard faucet.
Operating Instructions
The PUR PLUS Faucet Mount Water Filtration System offers convenient access to both filtered and unfiltered water.
- On/Off Lever: The system is equipped with an on/off lever located on the side. Push the lever to switch between filtered water (lever in one position) and unfiltered water (lever in the other position). This allows you to conserve filter life when filtered water is not needed, such as for washing dishes.
- Filter Change Light: A built-in indicator light on the front of the unit will notify you when it's time to change your filter. The light typically changes color (e.g., green to orange to red) to indicate the remaining filter life. Replace the filter promptly when the light turns red to ensure continued optimal filtration performance.

Image: A user utilizing the PUR faucet mount system to fill a colander with filtered water, demonstrating its practical application in a kitchen setting.
Maintenance
Regular filter replacement is crucial for maintaining the performance of your PUR PLUS Water Filtration System.
- Filter Lifespan: Each Genuine PUR PLUS Faucet Mount Water Filter is certified to last for up to 100 gallons or approximately 3 months of regular use, whichever comes first. The filter change light will provide a visual reminder.
- Replacing the Filter:
- Turn off the water supply to the faucet.
- Unscrew the filter housing from the faucet mount.
- Remove the old filter and dispose of it properly.
- Insert a new Genuine PUR PLUS Faucet Mount Replacement Filter into the housing, ensuring it is seated correctly.
- Screw the filter housing back onto the faucet mount until it is secure.
- Turn on the cold water and flush the new filter for 5 minutes.
- Genuine PUR Filters: Always use Genuine PUR Faucet Mount Replacement Filters. Compatible filters may not offer the same level of filtration or certification.

Image: A close-up view of hands demonstrating the process of replacing the blue PUR water filter cartridge within the chrome faucet mount system.

Image: The official "PUR Genuine Filter" seal, emphasizing the importance of using authentic PUR replacement filters for guaranteed performance.
Troubleshooting
If you encounter issues with your PUR PLUS Faucet Mount Water Filtration System, refer to the common problems and solutions below. For more detailed guidance, please consult the official Troubleshooting Guide (PDF).
| Problem | Possible Cause | Solution |
|---|---|---|
| Water leaking from the system. | Loose connection, worn O-rings, or damaged housing. | Ensure the system is securely threaded onto the faucet. Check O-rings for proper seating or damage; replace if necessary. If housing is cracked, the unit may need replacement. |
| Slow water flow. | Clogged filter or air trapped in the system. | Replace the filter if it's nearing the end of its life or the indicator light is red. Run water for a few minutes to clear any trapped air. |
| Filter change light not working. | Battery issue or sensor malfunction. | The unit uses a Lithium Ion battery (included). If the light is completely off, the battery may be depleted. If the light is stuck, contact customer support. |
| Water tastes or smells unusual. | Filter needs replacement or improper flushing. | Replace the filter. Ensure the new filter was flushed for the recommended 5 minutes after installation. |
Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 5.25 x 6.75 x 2.87 inches |
| Item Weight | 1.15 Pounds |
| Model Name | PLUS Faucet Mount Water Filtration System, Chrome |
| Item Model Number | PFM400H |
| Installation Type | Single Hole (compatible with most standard faucets with external aerators) |
| Supported Water TDS Level Maximum | 500 PPM |
| Filter Lifespan | Up to 100 Gallons or 3 Months |
| Battery | 1 Lithium Ion battery (included) |
| Manufacturer | Kaz |
| UPC | 723987204000 |

Image: A diagram illustrating the key dimensions of the PUR faucet mount filter: 5.2 inches in length, 6.8 inches in width, and 2.9 inches in height.
Warranty and Support
For information regarding the product warranty, please refer to the documentation included with your purchase or visit the official PUR website. If you require technical assistance, have questions about installation, operation, or maintenance, or need to order replacement parts, please contact PUR customer support.
Additional resources:
- Official User Manual (PDF): Download Here
- Troubleshooting Guide (PDF): Download Here
- Visit the PUR Store on Amazon: PUR Store
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.







