Can’t find age for 52 gal Rheem Standard heater. RO 0478M3824
RO 0478M3824 is typically the fourth month of '78 or april of 1978.
Does it look that old?
It doesn’t really look that old, owner could not remember when it was replaced. Moisture in basement but unit has no visible signs of deterioration.
Nevertheless, it appears 30 years old