Upon arrival customer stated the water was not getting as hot as normally dose. I asked the customer if the water heater has ever been flushed and the customer stated no it has not. I informed the customer the water heater was installed in 21 and it not being serviced could be a result in the water not getting as hot as normal. Gave customer estimate. Customer approved estimate. I flushed the water twice and was able to blow out a good bit of sediment in the tank. I informed the customer they would have hot water again in 30-45 minutes.