Quick Answer: Check your water heater’s manual before doing any maintenance. Many tank water heaters need periodic flushing to remove sediment, while tankless models use a different cleaning process. Before draining a tank, turn off the electricity or gas, allow the water to cool, and direct it to a safe drain. Call a plumber if the unit is leaking, heavily rusted, or difficult to operate.
Why Water Heater Maintenance Matters
Minerals in the water can settle at the bottom of a tank and form sediment. Over time, this buildup may reduce efficiency, create unusual noises, and place added stress on the water heater. Routine maintenance can help the unit operate properly and may extend its service life.
Read the Manual First
Maintenance instructions vary by manufacturer and model. Some tank water heaters may need periodic flushing, while many tankless water heaters require periodic descaling according to the manufacturer’s instructions. Read the manual before opening valves, draining water, or turning off the energy supply.
How Tank Flushing Works
Flushing usually involves turning off the electricity or gas, allowing the water to cool, connecting a hose to the drain valve, and directing the water into a safe drain. The tank is then refilled before the energy supply is restored. Hot water can cause serious burns, so contact a qualified plumber if you are unsure how to complete any step safely.
When to Call a Plumber
Professional help is recommended if the drain valve will not open, the water heater is leaking, the tank shows heavy corrosion, or you smell gas near the unit. A plumber can perform maintenance, diagnose problems, and make repairs that are outside the scope of a home inspection.
Signs of a Water Heater Problem
Possible warning signs include water around the tank, rusty or discolored hot water, unusual popping sounds, changing water temperatures, and visible corrosion. These signs do not always mean the water heater must be replaced, but they should be evaluated before the problem becomes more serious.
What Can a Home Inspection Tell You?
During a home inspection, the inspector evaluates visible and accessible parts of the water heater. This may include its general condition, installation, venting, fuel or electrical connections, visible corrosion, and the temperature-and-pressure relief discharge pipe. A standard inspection does not include draining, flushing, dismantling, or repairing the unit.
Frequently Asked Questions
How often should a tank water heater be flushed?
Many manufacturers recommend flushing a tank water heater about once a year, but the correct schedule depends on the model, water quality, and manufacturer’s instructions. Homes with hard water may experience sediment buildup more quickly.
Does a tankless water heater need maintenance?
Yes. Many tankless systems require periodic descaling to remove mineral deposits. The schedule and cleaning procedure vary, so follow the manufacturer’s instructions or contact a qualified plumber.
Can sediment cause a water heater to leak?
Sediment can contribute to overheating, reduced performance, and added wear, but not every leak is caused by sediment. Leaks may also come from valves, connections, or corrosion inside the tank and should be evaluated promptly.
Is it safe to drain a water heater myself?
It may be safe when you understand the equipment and follow the manufacturer’s directions, but the water and nearby components can be dangerously hot. Stop and call a plumber if you cannot safely turn off the energy source, operate the valve, or direct the water to an appropriate drain.
Does a home inspector flush the water heater?
No. A standard home inspection is visual and does not include flushing or servicing the water heater. The inspector reports visible conditions and may recommend further evaluation when signs of leakage, corrosion, improper installation, or other concerns are present.
When a Home Inspection Can Help
A home inspection can help buyers and homeowners understand the visible condition of a water heater and other major home systems. Five Star Home Inspection Group provides residential property inspections for buyers, homeowners, and investors in Muncie and throughout East Central Indiana. Inspections are led by Indiana Licensed Home Inspector Gary Bennett and include clear reports about visible property conditions. Schedule your inspection online or call 765-215-2101. Follow your water heater’s manual and contact a qualified plumber for maintenance or repairs.
Sources and Maintenance References: Guidance used for this article comes from A. O. Smith’s water heater flushing instructions and the U.S. Consumer Product Safety Commission’s information about preventing hot-water burns.