Quote:
Originally Posted by Topspinmo
Who gets 15 years out of water heater  and if you do if full of calcium deposits with little water. IMO thats why the little water supply can’t hold temperature, you probably get 10 gallons heated? |
You certainly can get twenty years if you flushed it annually.
As to your second point a new 40 gallon heater provides 28 gallons. Not because 28 gallons is forty, rather 28 gallons of cold water displacing 28 gallons of hot makes it so cold that it's not effectively functional as the heating elements cannot over come the temperature loss quickly enough. At 28 gallons the tank is full of 85 degree water which feels cool.