You ask, "What is the advantage of hot water tank in the garage?" Well it is a good way to get your shop floor cleaned and wash the ends of oak, mahogany, etc. and wash the sides of plywood sheets. It also seems to get all moveable tools into new locations---including outside.
Oh yes, it also creates back aches in self and Love Of Your Life.
My shop is in the garage. Like many garages, it contains the hot water tank.
I came home after my woodturning class and found a half-inch of water on the floor. Whoopie Duck.
Now I only have to come up with $700.oo for a new tank (I could have used that for lathe tools, chuck, etc.). Doesn't that add insult to injury?
OK I'm thru crying. You might want to flush some water (drain out a few gallons of water) if you have not done this for awhile. Or if your tank is 12 years old, as mine was, consider a new one. And with that last comment comes a request for all plumbers to send a donation to the James C Bradley new tool fund. This is fully not deductable from your income tax.