Customer went to drain his water heater per yearly maintenance however, when doing so he discovered there was a leak at the bottom of the heater indicating that the heater needs to be replaced. Installed new 50 gallon electric water heater with 10 year warranty. Installed new thermal expansion tank ball valve and drip pan. Per code installed a disconnect switch. After installing heater, we restored water back to the building checked for leaks and found none. Water pressure is in the safe range at 50 PSI.