Does anyone have a good cheat sheet they would be willing to share that describes the numbering convention of serial numbers for different manufacturers.
Normally it can be deciphered in the first 4 characters but sometimes this does not suffice. I’ve seen the serial number descriptions for Bradford White, Ruud, Rheem and Richmond but there are a lot of others out there.
Any assistance would be appreciated…
Nice info. Joe.
Here’s additional info…
](http://www.fastwaterheater.com/model%20%20serial%20number.htm)
Here is more info.
This is what makes this MB the top of the line.:D:D
NACHI folks.
Thanks.
Thanks to both Joe and David. Excellent information and just what I was looking for. Appreciate it!! 
Jeff
Just when you think you’ve seen’em all!
This water heater is a ‘Trageser’ 30 gallon gas unit:
serial # A61697 - Assumed year 97’. Couldn’t find a thing on this brand.
