Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Will these fit the American Big Berkey correctly?
Document: This nine inch filter is too long to fit my Big Berkey. Returned it over two weeks ago and haven't seen by credit yet.
The taste of water from these filters is as good as the black filters. They are constructed well and fit my American bought Berkey unit.
They are much nicer than the black replacement Berkey filters, but they won't fit the fluoride filters which I need.
These are replacement filters for my Big Berkey. They arrived promptly and were a good value.I would recommend NOT running water from a dehumidifier through this type of filter since that seems to ruin them.
I purchased a Berkey Light several years ago to filter our water, I'm using well water that is good water to begin with, but store it in a big tank, I don't want to drink what might be growing in the tank, I also don't want to have to put chemicals in my tank either, so the Berkey Light takes care of that nicely. Eventually the black elements began to slow down, it was time to replace them.
These ceramic filters are a big improvement over the black filters. Water tastes fresh and they filter rapidly. And less expensive, too!
Exactly what we needed to make our Berkey we bought last year run a little faster, taking it from four filters to six. Thank you!
These work great with our travel Berkey and seem to be filtering much faster than the original Berkey charcoal filters. No complaints after a month of use. Works as advertised.
Bought these, currently use Black Berkey but thought having a spare filter would be good in times of emergency so I have these sitting on my shelf along with my WaterBob.
the berkey ceramic filters take the chorine taste out of city water and I would recemend to a friend. keep them indoors in freezing weather because they will freeze and burst
Answer: Yes, the 9" filters will fit the Big Berkey as well as the British Berkefeld systems.  The only size we do not recommend the 9" filters for is a "Travel Berkey" as they are too tall to work effectively.  There are 7" filters that work well for that system.  Additionally, we sell a larger filter for the "Imperial Berkey".  Please let us know if you have any other Berkey filter questions.