Leaky Hot water Tanks!
Hot water tanks
Reheem 
John Wood 
GE 
How to determine the age of Bradford and White Tanks
The life of hot water tanks is approximately 10 to 15yrs, depending on where you are located and if the maintenance has been kept up. Some brands are better than others, Reheem seems to be popular these days but John Wood, Bradford and White, General Electric are all acceptable names.