Technician arrived, customer explained that water heater was from 2014, technician offered to install a new Bradford white 50 gallon hot water heater or gave customer option of replacing temperature and pressure valve. Customer opted to have the T & P valve replaced for the time being. Tech shut off water to tank put burner on pilot, drained tank below T & P valve removed, t&p valve replaced with similar valve. Once a new valve was installed tank was refilled and tested to ensure proper function as well as no leaks being present. Temperature control for tank was turned down, customer has been made aware and explained why technician needed to turn down, bringing water heater to code.