What Annual Maintenance Includes
Tank sediment flush: we connect a hose to the drain valve and flush accumulated sediment from the tank floor. In DFW water, this can be significant after just one year. Anode rod inspection and replacement: the sacrificial anode rod protects the tank lining from corrosion — when it’s depleted, the tank starts corroding instead. Most anode rods last 3–5 years in moderately hard water. Pressure relief valve test: we manually open the T&P valve to verify it’s not stuck (a stuck PRV is a safety issue). Thermostat check. Flue inspection on gas units. Connections and shutoff valve check.
Why DFW Water Is Harder on Water Heaters
DFW municipal water is moderately hard — typically 100–200 mg/L depending on your city and water source. That mineral content precipitates out as calcium carbonate when water is heated, settling on the tank floor and coating heating elements. The result: longer heating cycles, higher energy bills, rumbling and popping sounds, and — if ignored long enough — overheated tank bottoms and premature failure.
Tankless Maintenance
Tankless water heaters need annual descaling — flushing the heat exchanger with a descaling solution to remove scale deposits. We also check the inlet filter screen, test ignition, verify venting, and check error code history. A properly maintained tankless heater reaches its 15–20 year service life; a neglected one may fail in 7–10.