Free water heater, is it still good?

I just bought a new house (first one!) and the existing water heater is over 15 years old. My father-in-law has a 50-gallon gas water heater that he only used for a few months before upgrading to a bigger tank because he upgraded his bathroom...
Question: If the 50-gal water heater was emptied and has been sitting in his garage for 2 years, are there any problems that could exist or manifest over the years in an empty tank?
I'll check the anode and pressure valve, but any other major things to look out for? Any quick & dirty tests I can do when I first install it to make sure it's good for the next 10-15 years?
Thanks!
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they don't wear out sitting there. however, if it wasn't completely drained, then it could have rusted out.
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Various things could have happened, depending on conditions while stored, mainly to tank innards, gas fittings & burner. E.g. bugs, cocoons, corrosion, etc.
You might ask plumber to look at it.
Whatever you do, consider unions in all the lines to make it quick-disconnect.
HTH, J
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It should be fine. However, if the holes were not plugged, be sure no mice made nests in it, and around the burner too. No matter what, I'd wash it out (outdoors) with the garden hose to remove any crap that may have gotten inside.
Mark
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snipped-for-privacy@UNLISTED.com says...

What's the best way to wash out a disconnected water heater that may (or may not) have rust on the bottom? Stick a hose in the cold water inlet at the top and leave the drain open at the bottom? Should I fill it out about 10% and get a couple of guys to swish it around? etc...
Tnx
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