Thompson plumbing installed 75 gallon NG water heater. Replaced 1” isolation valve, flex lines and gas supply. Installed original sediment trap. Installed drip pan and expansion tank. Turned water back on. Lit water heater. Checked for leaks. No leaks found. Flushed out lines. Cleaned up work area. Took pictures. Collected payment. 1 year warranty on labor. 6 years manufacturing warranty.