Ask about BO Series Unique Compound Filter
Choose 6-Stage Multifunctional Filter for BO Series daily filtration with bacteria removal, chlorine reduction, and heavy metal reduction.
Choose 9-Stage Multifunctional Fluoride Reduce if you want added fluoride reduction in addition to multifunctional filtration.
Designed only for Purewell BO Series filter systems and not intended for K Series, SS Series, or other gravity systems.
Each box includes 2 filters. Install both filters together for the listed flow rate and rated filter life.
Flush filters before first use according to the product instructions.
Replace the filters when the rated capacity is reached or when water flow becomes noticeably slower.
How to Use the Compound Filter
Follow these simple steps to prime, install, and use the compound filter correctly with compatible Purewell systems.
Prime the Compound Filter
Before installation, remove the round lid and filter washer from the top of the compound filter, then rinse the filter under running water.
Install the Compound Filters
Insert the compound filter and filter washer through the installation hole, then secure the filter with the remaining washer and round lid.
Important Notice
Follow these care tips to ensure proper use and avoid clogging, poor flow, or compatibility issues.
How the Filter System Works
Water is added to the upper chamber and flows downward through the filter elements by gravity. After passing through the filters, the filtered water collects in the lower chamber and is ready to dispense.
Pour water into the top chamber. The system works without electricity, plumbing, or complicated setup.
Water naturally moves downward through the filter elements, where the filtration process takes place.
Once filtered, the water collects in the lower chamber, ready to use whenever you need it.
Open the spigot to pour filtered water for drinking, cooking, or everyday use.
Filter Replacement Guide
Replacing filters on time helps your filtration system keep working properly. It also helps maintain water flow, drinking water taste, and everyday use confidence.
Filter life may vary by water quality, usage frequency, and total water volume filtered.
Replace the filters when they reach the rated lifespan listed for your filter model.
If filtering takes much longer than usual, clean or replace the filters as needed.
If unwanted taste or smell becomes noticeable again, it may be time to replace the filters.
Rain, river, stream, or well water may shorten filter life compared with regular tap water.
Choose filters that match your filtration system, filter series, and setup.
Prime, rinse, or flush new filters according to the product instructions.
Make sure washers, seals, and threaded parts are installed correctly.
Empty and clean the upper and lower chambers before installing new filters.
If your system uses paired filters, replace matching filters together when needed.
Write down the replacement date and set a reminder based on your usage.
Use this checklist to choose the right replacement filter for your Purewell system and check whether it may also fit select compatible systems from other brands.
| Filter Category | Filter Type | Fits Purewell Systems | Other Compatible Systems |
|---|---|---|---|
| K Series Carbon Filters (Pro) | Core Filter | SS Series and K Series filtration systems. | Select ProOne Big+ / Big II and Berkey BB9-2 style systems. |
| K Series Carbon Filters | Core Filter | SS Series and K Series filtration systems. | Select ProOne Big+ / Big II and Berkey BB9-2 style systems. |
| K Series Carbon Filters (Classic) | Core Filter | SS Series and K Series filtration systems. | Black Berkey Elements style systems and select Berkey gravity systems. |
| K Series Ceramic Filters | Core Filter | SS Series and K Series filtration systems. | Most gravity-fed systems from major brands, including Berkey, ProOne, Alexapure, Waterdrop, Doulton, Boroux, Culligan, and more. |
| SS Series Square Carbon Filters | Core Filter | SS Series and K Series filtration systems. | Select ProOne Big+ / Big II and Berkey BB9-2 style systems. |
| SF Series Multi-Functional Filter | Core Filter | SF Series filtration systems. | Select Zero pitchers and dispensers. |
| BO Series Unique Compound Filter | Core Filter | BO Series filtration systems only. | Not intended for K Series, SS Series, or other gravity filtration systems. |
| K Series Specialty Add-On Filters | Supplemental Filter | Use together with K Series or SS Series core filters. | Select Travel, Big, Royal, Imperial, Light, and Crown Berkey models as an additional filter option. |
Compound Filter Installation Video
Watch this quick guide to install your Purewell Compound Filter correctly. Proper installation helps support stable water flow and reliable daily filtration performance.
Compound Filter Setup
This video shows how to install the Purewell Compound Filter with a compatible filtration system. Follow the guide before first use or when replacing an old filter.
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