Arrived on site to preform annual maintenance inspection. At this time all fixtures in the home are functioning as designed with no issues. Drained and flushed water heater during inspection and logged all data in to ServiceTitan. Flushed water heater four times to ensure as much sediment was removed as possible. After preforming water heater drain and flush I restored water to the tank and ignited. After firing off water heater I then tested for CO., and for gas. No signs of CO or gas was found during testing. Documented process in ServiceTitan. Preformed water analysis test, at this time water has a hardness of 8 grains. PH level of water was at 7.0 with a 0.0 iron reading. Informed customer of findings. Customer is aware of the iron level as well as the HOA and the city. Cleaned area and informed customer of work completed. Customer at this time would like a secondary appointment for HVAC technician to come out and look at overall condition of furnace. Customer is now in a upgraded