By Zach Ryan, General Manager
Back-to-school season resets the family calendar. Lunches get packed, activities return and homeowners begin the annual shift from summer projects to fall maintenance. Furnace filters and gutters usually make the list, but one appliance that works every day of the year is easy to overlook: the water heater.
That matters because water heating is typically the second-largest energy expense in a home and accounts for about 18% of household energy use. A water heater does not need much day-to-day attention, but periodic maintenance can help it deliver reliable hot water efficiently.
So, do you need to flush it? If you have a traditional tank-style water heater, the answer is usually yes. Many manufacturers recommend draining and flushing the tank about once a year, although the correct schedule for your home depends on the model, water quality, hot-water use and the manufacturer’s instructions.
Why sediment collects in the tank
Water naturally carries minerals and small particles. As water is heated, some of that material can separate and settle at the bottom of a storage tank. Over time, the layer may interfere with heat transfer, reduce usable hot-water capacity and contribute to rumbling or popping sounds.
Mineral content varies from one community to another and between public water systems and private wells. Michigan homeowners connected to a public system can review their supplier’s annual water quality report. Private-well owners can contact their local health department for information about testing and local water conditions.
Signs it may be time for service
A water heater may need attention if it begins making popping or rumbling noises, takes longer to recover after heavy use, runs out of hot water sooner than expected, or produces cloudy or discolored hot water. Those symptoms do not always mean sediment is the only problem, but they are good reasons to check the unit’s maintenance history and overall condition.
Even when there are no obvious symptoms, a once-a-year flush is a sensible starting point for many tank-style units. Homes with harder water or unusually heavy hot-water use may need more frequent service. The owner’s manual should always take priority over a general rule.
Tankless water heaters are different
A tankless water heater does not store dozens of gallons of water, so it is not maintained in exactly the same way. Instead, mineral scale can collect inside its heat exchanger. Tankless models generally require a manufacturer-specified flushing or descaling procedure, along with filter inspection. The interval depends on the model and local water conditions.
Can a homeowner do it?
Some homeowners are comfortable flushing a tank-style water heater themselves, but it is not the right do-it-yourself project for everyone. The process involves very hot water, a drain hose, a shutoff for the cold-water supply and either gas or electrical controls. Using the wrong procedure can cause burns, water damage or equipment damage.
Before doing anything, locate the model number and read the manufacturer’s instructions. Consider professional service if the drain valve is stuck or leaking, there is visible corrosion, the unit has never been maintained, the water heater is older, or you are not comfortable shutting down and restarting gas or electrical equipment. Always allow the water to cool and follow the equipment’s safety instructions. A flush is routine maintenance; it will not repair an active leak or badly corroded tank.
Make it part of the fall checklist
September is a practical time to review the water heater because households are returning to regular routines and an unexpected cold shower will be even less welcome once colder weather arrives. Start by checking the age and model of the unit, looking for moisture or corrosion around the tank, and noting any changes in noise or hot-water performance.
A complete professional maintenance visit may include more than flushing. Depending on the equipment, a technician may also inspect the temperature-and-pressure relief valve, anode rod, venting, air intake, electrical connections and visible plumbing connections.
The takeaway is simple: most tank-style water heaters benefit from periodic flushing, and annual service is a common recommendation. But the best schedule is the one specified for the equipment and adjusted for the home’s water conditions. Adding the water heater to the fall maintenance list now can help prevent it from becoming the appliance everyone notices only after the hot water is gone.