Customer Stated: They were unable to get any hot water through out the home after we were previously out for repairs for piping. Tech Notes: Upon inspection I found that this is a AO Smith 50 gallon natural gas water heater located in the utility closet of home, and is only 3 years of age which is still within manufacturing warranty. I found that upon arrival the pilot light was out, and the thermal expansion tank was full of water which is out of code. I let tenant know we would need to replace the expansion tank, and relight the pilot to get the water heater up to code, and functioning properly. Resolution: I was able to successfully pilot/ignite the tank along with removal of the existing failed thermal expansion tank with no issues. I was able to install brand new expansion tank with no issues. I fully pressurized tank, and saw that the burner was still lit for 20+ mins with no issues. Job Status: Complete Estimates: N/A