Technician Mike responded to a call concerning bulging drywall in the basement ceiling. Upon arrival Mike met Jason who directed him to the basement. There he explained that he first noticed it last week and the kitchen area is right above it. Jason then said that he hasn’t seen any water or moisture around the bulge either. Mike examined the bulge and agreed with Jason. There is no evidence of past or current water damage. Mike took photos of it and told Jason he would speak with a Spartan crew member that does drywall and get his opinion. Mike then asked to view the water heater and main water shut off. Jason then directed Mike to the basement mechanical room where the 50 gallon natural gas power vent water heater is. The home was built in 2018. Jason and his family moved into the home in 2020. Upon examining of the water heater, it was discovered that the thermal expansion tank had failed. It is now holding water instead of air. Mike also asked if the water heater had ever been flu