Customer complained about brown water coming through faucet for bathroom tub/shower fixtures. Ran water in downstairs guest bathroom tub, water ran for a couple of minutes before turning color. Looked at water heater in garage. Found 13 year old water heater that has never been serviced. Water heater is also leaking from base. Water heater needs to be replaced. Gave customer quote for installing standard and tankless water heaters. Existing water heater can not be flushed given its age, and that it is already leaking. Flushing water heater will cause more issues. Water heater also has signs of flame roll out indicating that gas chamber is no longer sealed properly. Customer is getting multiple quotes for insurance to replace under home warranty.