While Black Berkey filters are known for their performance, it’s important to note that they have not been tested to NSF standards, and therefore the lifespan claims (like 3,000 gallons per filter) are not independently verified.
For that reason, we personally recommend replacing Black Berkey filters every 2 years to ensure consistent water quality — even if they appear to still be working.
Since Black Berkey filters are no longer available for individual purchase, we recommend switching to Coldstream FTO+ filters when the time comes. They’re fully compatible with Berkey systems and offer a number of key advantages:
I just installed my Berkey, but water is not flowing through the water filters
Black Berkey elements must be primed before first use. The purpose of priming is to saturate the micropores of the water filter with water and initiate the flow of water through the filtering element. Due to the inherent surface tension of water, gravity alone will not be enough to purge the air from the micro-pores.
Water in the upper chamber does not fully empty into the lower chamber of the water filter
If the water starts filtering through your elements, then stops before the water fully empties out of the upper chamber, then that is a sign that there is still some air left in your water filters. To get proper output from your Berkey water filtration system, your Black Berkey elements must be properly and fully primed. To test whether the air has been fully purged from your Black Berkey elements, fill the lower chamber of your Berkey system with tap water and place the elements, stems facing upwards, in the water chamber. Fully purged elements should sink to the bottom. If your elements float, then you have to redo the priming procedure till the filters sink.
I have been using my water filters for six months and my system’s flow rate has decreased. Do I need to replace the filters?
If you notice that your system’s flow rate has decreased over time and before the 2-year limit, simply remove the elements from your system by unscrewing the wingnuts, scrub the exterior of each element under running water with a green nylon scouring pad or a stiff toothbrush and reassemble the system. It’s simple to do and the whole procedure takes less than 10 minutes.
How do I test my Berkey water filtration system to ensure it’s working properly?
You can test the Black Berkey elements by performing the Red Food Coloring Test. Fill the upper chamber with water, and then add a tablespoon of red food coloring for every gallon (4 liters) of water. If the food coloring is removed entirely, your system is working properly. If not, make sure the wingnuts on the elements are securely tightened then re-run the test. Beware that over tightening can strip the wingnuts, and under tightening may not secure a water-tight seal.
The wingnuts on my Black Berkey elements are stripped, they won’t secure the water filters in place.
Use Teflon tape around the stem of the Black Berkey element and fasten with the wingnut. The Teflon tape should help to secure the wingnut in place. If this doesn’t work, contact us and we’ll send you replacement wingnuts.
Can I filter sea (salt) water through my Berkey water filtration system?
No. Berkeys do not remove minerals from water. Furthermore, the concentration of salt in seawater will ruin the elements.
Can I filter water from my salt-based water softener?
If you use a salt-based water softener to reduce the problems associated with hard water in your home, just as with sea water, Berkeys will not remove salt present in the treated water. If you want to eliminate salt from your drinking water, you must either:
- Use your Berkey water filter with water taken on the water line before the softener,
- Change your water softener for a salt-less system or
- Use a membrane treatment filtration system after the softener to remove the salt.
I have noticed water on the floor near my Berkey water filter. What could be causing it to leak?
- Water could be dripping from the spigot. If this is the case, make sure that the spigot is installed correctly, with one washer on either side of the chamber body, and properly tightened. When installed properly and hand tightened, they form a water-tight seal. The washers for the (plastic) Berkey Light spigot need the slanted sides facing each other.
- You may have overfilled your Berkey. You can only put as much water in the upper chamber as there is empty space in the lower chamber. If your lower chamber is already half full and you fill the upper chamber, water will continue to filter through the Black Berkey elements even after the lower chamber is full, and water will be forced out of the system where the upper and lower chambers meet.
I have a water softener installed in our house, can I filter that water through my Berkey water filter?
As Berkey water filters do not remove minerals and salts from water, we do not recommend Berkey for use with a water softener. It is better to use your Berkey water that has not gone through your softener.
Can I use PF-2 elements instead of Black Berkey elements?
No, the PF-2 elements are post-filters that are screwed onto the bottom of the Black Berkey elements, just as a lightbulb. They hang below the upper chamber and sit inside the lower chamber of the Berkey system. The PF-2 elements are for fluoride and arsenic removal from municipal tap water.
I have high pH in my water; will that reduce the efficiency of the PF-2™ Elements?
High or low PH impedes the ability of the media to remove fluoride. For maximum removal efficiency, maintain the water being treated between a PH level above 5 and below 7.
In case of an emergency, can I take water from our pool and filter it with my Berkey water filtration system? Will all the chlorine be removed?
Yes, Berkey water filtration systems will remove chlorine from pool water and make it safe for consumption. However, keep in mind that such a use will cause the elements to wear out much faster. So it is best not to use pool water with your Berkey on an ongoing basis unless it is in case of an emergency.
A leak at the base of the stainless steel sleeve can usually be stopped simply by tightening the top cap at the top of the glass tube (see photo below). The cap should be firmly hand-tightened only.
If this does not stop the leak, follow these steps:
- Remove the top cap and check that the silicone washer is in place. Reinstall the top cap and check again for leaks.
- If the leak persists, remove the top cap and slide the glass tube upward and out of the stainless steel spigot.
- Flip the glass tube upside down and reinstall it, then replace the top cap, tighten, and check again.
- If the leak continues after these steps, please contact your authorized Berkey® dealer.
If you're dealing with a stuck floating ball:
- Remove the top cap from the top of the stainless steel sleeve.
- Remove the silicone washer from inside the top cap.
- Make sure the hole in the silicone washer is fully open (see image below).
- If needed, you can use a clean straw or similar tool to push the float down.
- Reinstall the silicone washer and top cap, and retest.
If the float is still stuck, follow the instructions below:
- Empty the water from your Berkey Water Filtration System.
- Remove the top cap along with the silicone washer inside.
- Carefully slide the glass tube upward and out of the stainless steel spigot.
- Run water through the glass tube, being careful not to lose the float.
- Reinstall the glass tube, insert the float, and reinstall the silicone washer and top cap.
- Hand-tighten the top cap firmly only.
- Refill the system with water and test.