Anyone have an idea about the length of an anode rod in an A O Smith Model FSG 40 propane gas water heater? My heater is 5 years old and I was just curious about the length in case I do decide to replace it. The tank is a 40 gal and is 53" tall (including the burner compartment underneath) and I only have a little more than 3 feet above the heater to be able to remove a rod straight out without having to undo sweated plumbing work to move or tilt the heater. Do they usually extend all the way to the bottom of the water tank, or are shorter? I checked at the A O Smith site and was able to find the PDF parts list for my specific heater, which document is in poor shape, with some parts of part numbers missing or unprinted in the document. Additionally, there are different anode rod numbers listed under headings like; SMR S44, SMR S33, SMR K32, SMR S4, etc. There is no SMR info printed on my heater label. No big deal at the present. I was just reminded of it because of an anode rod mentioned another thread.
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19 years ago