Customer states after work was done on the 20th yesterday morning they had brown colored water come out bathtub. She also stated that the water does not stay hot as long. Tested hall bathroom tub and faucet and kitchen faucet simultaneously for 20 minutes which was running approximately 5 gallons a minute. And the heater started to dilute aroun 15 minutes into running the water. I detected no issues with the heater at all besides the brown colored water. The heater likely needs to be flushed but due to the age of the heater we can not flush the heater. Job is completed.