[Craig Vernon]

Replace the zinc rod that attracts minerals and slows tank decay, unless you have a well, never. Drain tank of sediment by opening drain at the base of tank, nope, the cheap valves will either leak or break at a higher concern than any advantage. Tanks can last 5 years, or 25 years and it usually depends on demand so in TV with two adults they can last a long time. Visually inspect your tank when passing by and look and listen for changes. If you have a concern, get an inspection. Tankless natural gas water heaters can go out of adjustment and have more stringent maintenance requirements; however, the rule of thumb is the same stop look and smell. If you have a change in the delivery of hot water from any natural gas tank call for service. Remember if you call a fox (service person) into your hen house eventually, he will eat your chickens. 35 Years working on and around natural gas equipment.