Introduction
The BWT Long Life Mg2+ Water Filter Cartridge is designed to enhance tap water quality by reducing limescale and heavy metals, while enriching it with magnesium. This process improves the taste of drinking water, tea, and coffee, and helps protect household appliances from limescale buildup. Each cartridge has a capacity of 120 liters or lasts for 28 days, whichever comes first.
This manual provides essential information for the proper installation, use, and maintenance of your BWT filter cartridges.
Setup and Installation
- Unpack the Cartridge: Remove the new BWT Long Life Mg2+ filter cartridge from its protective packaging.
- Initial Rinse: Submerge the new filter cartridge in a bowl of cold tap water for approximately 5 minutes. Gently shake it to release any air bubbles. This prepares the filter for optimal performance.
- Insert into Pitcher: Place the prepared filter cartridge firmly into the funnel of your compatible water filter pitcher. Ensure it is seated correctly to prevent unfiltered water from bypassing the filter.
- First Fill: Fill the pitcher with cold tap water. Allow the water to filter through the cartridge. Discard the first two filtered fillings. This flushes out any loose filter material and activates the cartridge.
- Ready for Use: Your BWT filter cartridge is now ready for use.

Image: A BWT Long Life Mg2+ water filter cartridge, showing its design and components. This image illustrates the filter unit ready for installation into a compatible water pitcher.
Operating Instructions
To use your BWT water filter pitcher with the Mg2+ cartridge:
- Fill the Pitcher: Open the lid of your water filter pitcher and fill the funnel with cold tap water. The water will slowly pass through the filter cartridge into the main reservoir.
- Wait for Filtration: Allow the water to completely filter through the cartridge before pouring. The filtration process is quick, ensuring minimal waiting time.
- Enjoy Filtered Water: Once filtered, the water is ready for drinking, preparing hot beverages like tea and coffee, or for cooking.

Image: A person holding a glass of clear, filtered water, highlighting the improved taste and clarity provided by the BWT filter.

Image: A hand pouring BWT filtered water into a kettle, demonstrating the use of filtered water for appliance protection and beverage preparation.
Maintenance and Cartridge Replacement
Regular replacement of the filter cartridge is crucial for maintaining optimal water quality and filter performance.
- Replacement Schedule: Each BWT Long Life Mg2+ cartridge is designed to filter up to 120 liters of water or last for 28 days, whichever occurs first. For a 3-pack, this provides approximately 3 months or 360 liters of filtration.
- Indicator: Many BWT water filter pitchers include an electronic or manual indicator to remind you when to change the cartridge. Follow your pitcher's specific instructions for resetting this indicator after replacement.
- Disposal: Dispose of used filter cartridges according to local recycling guidelines.
- Cleaning: The filter cartridge itself does not require cleaning. Only the pitcher components should be cleaned regularly according to the pitcher's instruction manual.

Image: A cutaway view of the BWT filter cartridge, illustrating the internal filtration layers including the ion-exchange resin and activated carbon granules responsible for reducing impurities and adding magnesium.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Slow filtration rate | Air bubbles trapped in the filter; filter is clogged or nearing end of life. | Remove and re-submerge the cartridge in water, shaking gently to release air. If problem persists, replace the cartridge. |
| Unpleasant taste or odor in filtered water | Cartridge not properly flushed; cartridge has reached end of life; water quality issues. | Ensure the first two fillings were discarded after installation. Replace the cartridge if it has reached its capacity or time limit. Contact local water authority if issues persist with new cartridge. |
| Water bypassing the filter | Cartridge not seated correctly in the funnel. | Remove the cartridge and re-insert it firmly into the funnel, ensuring a tight seal. |
Specifications
- Model Number: 814133
- Manufacturer Part Number: CART003
- Material: Plastic
- Product Dimensions: 2.5"D x 12.5"W x 5"H
- Item Weight: 0.45 Kilograms
- Unit Count: 3.0 Count (per pack)
- Filter Capacity: 120 Liters per cartridge
- Filter Lifespan: 28 days per cartridge (or 120 liters, whichever comes first)
- External Testing Certification: WQA
- Benefits: Improves water taste with added magnesium, protects kettles and coffee machines, reduces limescale and heavy metals.
Warranty and Support
For specific warranty information regarding your BWT water filter cartridges, please refer to the packaging or the official BWT website. BWT products are manufactured to high-quality standards.
If you require further assistance or have questions not covered in this manual, please visit the official BWT website or contact their customer support directly. You can often find contact details on the product packaging or on the brand's official online presence.
BWT Official Website: www.bwt.com





