as long as it heats water. you don't need to change the heater while it is still working. My heater was used for 17 years. when it started leaking water, it leaked very slowly. I bought one with 9 yrs warrenty, which costed around $410.
as long as it heats water. you don't need to change the heater while it is still working. My heater was used for 17 years. when it started leaking water, it leaked very slowly. I bought one with 9 yrs warrenty, which costed around $410.