Which Water Heaters Last the Longest in Hard Water Conditions?

Living in Tucson means hard water, and hard water wears down household appliances quickly. Selecting the right water heater in Tucson is important, because the right choice here means fewer replacements and repair costs down the line.

Which Water Heaters Last the Longest in Hard Water Conditions?

Our groundwater picks up high levels of calcium and magnesium from the soil and rocks, and while these minerals don’t pose any health risks, they definitely create some problems for plumbing systems. The problem is that when hard water is heated, all those minerals turn into scale, which is a hard, chalky deposit that sticks to your pipes, faucets, and the inside of your water heater.

Over time, this buildup reduces the water flow, forces the heater to work harder, and eventually causes it to break down. A standard water heater might last 12 years under normal conditions, but in hard water, that drops to as little as 5 to 8 years, especially if you don’t take good care of it.

Types of Water Heaters and How They Perform With Hard Water

Tank

Traditional tank-style heaters are the most common but also the most vulnerable. These units have a large storage tank, usually 40 to 80 gallons, where water sits and stays heated, either by a gas burner or electric element. Because the water sits in there all the time, sediment collects at the bottom and forms a layer that slowly insulates the heating element from the water.

That makes the heater less effective, which means you’re wasting gas or electricity and eventually overheating. On the plus side, this type of heater is easier to maintain with basic tools. If this is the type you want, look for tanks with sacrificial anode rods. These are metal bars that attract the corrosion so it stays off the tank walls. They have to be replaced regularly, but they extend the life of the heater.

Tankless

Tankless water heaters, also called on-demand units, don’t store water. They heat it instantly as it flows through a heat exchanger when you turn on the tap. This design saves space, fits better in tight spots like closets, and provides endless hot water. They’re often more energy-efficient, too. Manufacturers rate them for up to 20 years of service, which is longer than you’ll get out of traditional tanks.

In hard water, tankless models can still last that long, but they will require extra attention. The heat exchanger’s narrow passages are prone to scaling, and as that buildup happens, it restricts the water flow and can cause the unit to just start shutting down at the worst moments (like in the middle of your shower). Some advanced units have built-in sensors to alert you when the buildup is getting too much, but either way, you’ll need a periodic descaling of the unit.

Other Types

Heat pump water heaters and solar-assisted heaters are all very energy efficient, but they also have tanks, so they have similar issues to tank heaters. They still need to have their tanks cleaned of sediment regularly.

To make the right choice for your home, and for expert installation, repair, or maintenance, talk to us at Economy Plumbing Service, LLC in Tucson today.

Tags: hard water, mineral buildup, water heater
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