About Systems


What grade of Stainless Steel is used in Berkey® systems?
High grade polished food grade 304-stainless steel.

What is the Berkey Light made of?
The Berkey Light System is made from a new food grade copolyester developed in 2008 that is BPA Free. 

Is there a Berkey® system that will accommodate large groups?
Yes we offer two systems they are:

1) The Imperial Berkey™ system, when configured with six Black Berkey™ purification elements can purify up to 400 gallons per day (~17 gallons per hour) when the upper chamber is full (constantly topped up). This is enough to provide for up to 200 people on a sustained basis and up to 800 people on a short-term emergency basis.
2) The Crown Berkey™ system, when configured with eight Black Berkey™ purification elements can purify up to 650 gallons per day (~27 gallons per hour) when the upper chamber is full (constantly topped up). This is enough to provide for up to 325 people on a sustained basis and up to 1,300 people on a short-term emergency basis.

What is the most convenient method for filling the upper reservoir?
Most people use a pitcher to pour water into the upper chamber however, if you have a spray hose on your sink, using it to refill the system is a very convenient method.

As the water level in the upper chamber of my Berkey® system drops the flow rate slows. Is this normal? Yes it is normal. The filter elements flow is dependent on water pressure in the top chamber. When the chamber is full the water will flow through the filters much faster than when the top chamber is only partially full. To filter water at it's fastest you can keep the topping up the water level of the top chamber but be aware that if the bottom chamber will overflow if you don't keep an eye on the water level of the bottom chamber.

The water in the upper chamber of my Berkey® system does not drain all the way. Is this normal? 
Yes it is normal and not unusual for the last 1/2" to 1" of water to remain in the upper chamber. Smaller Berkey systems can retain up to 3-4" of water due to lower water pressure.  By design the water must pass through very fine micro pores within the elements in order to pass from the upper chamber to the lower.  The lower the water level in the upper chamber, the lower the pressure available to force the water through the micro pores.  You might have noticed that the system purifies much faster when full than when half full.  That is because there is more pressure.  The only way to remedy the problem would be to enlarge the pores within the filter elements.  That would of course, reduce the efficiency of the purification elements.  During each cycle the water left from the previous cycle mixes with the water from the current cycle and is then purified.  You should not be concerned about the excess water during normal use however if you discontinue using your filter for a period of time such as during a vacation, it would not hurt to empty the upper chamber before departing.

I have been using my system for about six months and the flow rate has slowed down considerably.  Do I need to replace the elements?
No, unlike other filtration elements Black Berkey™ purification elements are re-cleanable. What typically causes the filters to drip slowly is turbidity and sediment clogging the micro-pores of the purification elements. Simply remove the elements from your system, scrub the exterior of each element with preferably a white ScotchBrite pad or stiff toothbrush. Simply scrub a section of the filter until you see a bit of black on the white pad then move to the next section.  It’s simple to do and takes less than a minute. Then re-prime each element and reinstall them. Your problem should now be fixed.

How do I know when it is time to replace the elements in my system?
The best way to gauge when to replace the filters is to do the following:
1) Multiply the number of filters in your system by 3,000 gallons to get Total Gallons For All Filters within the system.
2) Next keep a track of how many times you need to refill the upper chamber in one week. 
3) Then multiply that figure times the capacity in gallons of your particular system (for example the Berkey Light™ system is 2.75 gallons) to determine 
Total Gallons Used Per Week.
4) Finally divide the 
Total Gallons Used Per Week into the Total Gallons For All Filters and that will tell you how many weeks before the filters should be replaced.
5) Next calculate the future date for replacement (52 weeks per year) and write that date on a sticker and attach it to the bottom of your system for future reference. 

By the way, if you have been using your system for some time now, you can still use the above formula to determine when to replace the elements. Just count forward from the date you purchased your system.

I will soon be leaving the country. Is there a way to test my Berkey® system to make sure it is working properly?
Yes, anytime you plan on taking your system out of the country we advise that you always perform the following test prior to leaving. You should test your filters by filling the upper chamber with water then add a tablespoon of red food coloring for every gallon of water within your upper chamber. If the red food coloring is removed entirely, your filtration system is working properly. If not, check to make sure that the wing nuts on your elements are securely tightened then re-run the test. By the way, always prime new purification elements before leaving the country, as you may not have enough water pressure to be able to prime the elements at your destination.

I just purchased a Berkey® system but the system is hardly filtering any water at all.  Am I doing something wrong?
Typically the problem you are experiencing is due to high water tension, which prevents the air from being purged from the micro pores of the new purification elements.  Included with your Black Berkey™ elements is a priming button and instructions for use.  Please remove and prime your purification elements, reinstall them and that should fix the problem.

I have found that when I boil the water or freeze it into ice cubes, I sometimes get little white floating things in the water.  What is this bacterium?
The little white floaters in the water are not bacteria but rather a problem that sometimes occurs with hard (heavily mineralized) water. When the PH level of the purified water is raised, the acidity of the water goes down and the water is no longer able to hold as many minerals in solution.  When this happens the minerals begin to precipitate out over time and depending on the mineral composition they will either sink to the bottom or float to the top.  This process is known as flocculation and the precipitated minerals are usually referred to as "white floaters".  The bottom line is that this is nothing to be concerned about, the white floaters are minerals that were already in your water; they are now simply visible whereas they were previously invisible due to their suspension in an ionic form.

I did a TDS reading on the purified water and was surprised to find that the reading was about the same with the purified water as it was with the unpurified water. Is my system working properly?
Yes, a TDS meter measures only Total Dissolved Solids or minerals; dissolved solids are simply dissolved minerals in an ionic form. A TDS meter does not measure the amount of biological and chemical contaminates.  Black Berkey™ elements are designed to leave in your water the healthy and beneficial minerals and to extract only the unwanted heavy metals such as lead and mercury as well as sedimentary minerals such as iron oxide and aluminum.  Therefore, your TDS reading will not change much unless you have a significant amount of heavy metals or sedimentary minerals in your water. TDS meters were originally developed for testing reverse osmosis systems which are designed to remove large amounts of minerals, including healthy minerals. It is generally not recommended to consume water only from reverse osmosis systems as these systems remove healthy minerals. Berkey water filter systems are designed to retain healthy minerals which will render a TDS meter ineffective.