Called out today due to there being no hot water Upon arrival found that the pilot light had been relight and was working properly but i also found that the expansion tank was leaking and heater was not up to code Had to cut out thermal expansion tank and replace expansion tank and all the way to heater, including new ball valve for the heater to bring heater up to code shut down water to the house and drained down the house Cut out the old expansion tank and the short bite flex line going to the heater that had the shark bite shut off on it Replaced shut off expansion tank installed expansion bracket for expansion tank turned water back on and tested for leaks There are no leaks at this time Job is complete No further estimates needed Customer was not home Would recommend some look at the floor in utility closet