Customer stated: they wanted their annual plumbing inspection. Tech notes: called out today to perform an annual water heater flush. While on site I found the 50 gallon natural gas power vent is outside manufacturers warranty and can’t be flushed. I performed an inspection on the water heater and found all code required items were up to date with no leaks or drips. Resolution: completed water heater inspection and found everything functioning properly as should. Job status complete.