I have the Berkey light unit and thought I share a tid bit about it. I've had my Berkey for a while now and use it every day. I still have the original filters on it, although I've had to clean the black filters more often now....as expected. Anyways, I had an issue with my Berkey light. There was a constant leak around the spigot area. I changed out the spigot and the problem was worse than before. Then I looked closer and found a small crack on the container just above the spigot. I contacted Berkey and was able to get a new lower chamber b/c I bought one within the last year. It was a total pain to get them to do anything about it. I told them that I wasn't sure that the one I bought last year was the same container that I had the crack in, so I asked if there was any identifiers in the container. I don't think they paid any attention to that. So, ultimately I did get a replacement, even though I had to pay to ship the original container back.
I didn't realize when I bought it that their warranty was only for 1 year. It's also a good thing to know that the plastic Berkey (even though it works for my needs) can crack, so be careful with the spigot. The lesson in all this is.....if you're looking for a Berkey to last a long time, it is probably better to go with the steel containers.
That is one reason I went with the steel container for mine. It's been bullet proof so far