Electric Water Heater Repair & Installation in Roswell, GA

An electric water heater looks like a plain metal cylinder, but inside are a handful of parts that each fail in their own recognizable way. For a Roswell homeowner, knowing what those parts do makes it easier to describe a problem to Alpha Plumbing and Sewer, follow a technician's explanation and judge whether a repair is worth it.

The tank and its shell

At the core is a steel tank, lined on the inside with a glass coating that keeps water off the steel. Around it sits a layer of foam insulation, and around that, the painted outer jacket you see. Cold water enters at the top but travels down a plastic dip tube to the bottom, so incoming water does not mix with the hot water waiting near the top. Hot water leaves through the outlet on top, often through heat-trap fittings that stop it from drifting up into the pipes between uses.

The heating system

Most residential electric tanks have two heating elements, an upper and a lower one, each controlled by its own thermostat behind an access panel. When the tank is cold, the upper thermostat gives power to the upper element first, so a little hot water becomes available quickly. Once the top of the tank is hot, power switches to the lower element, which then does most of the routine reheating. In standard wiring, only one element runs at a time. The upper thermostat shares its compartment with a high-limit switch and its red reset button, which cuts power entirely if the water gets dangerously hot.

The protective parts

• The anode rod. A metal rod, usually magnesium or aluminum, that corrodes on purpose so the tank does not. Once it is used up, the tank begins to rust.
• The relief valve. It opens if temperature or pressure gets too high, discharging through a pipe toward the floor.
• The drain valve. Near the bottom, used to drain the tank and flush out sediment.

What wears out, and how it shows

• Upper element or thermostat: no hot water at all.
• Lower element or thermostat: a short burst of hot water that runs out fast.
• A thermostat stuck on: scalding water, often followed by the high-limit tripping.
• High-limit trip: no hot water until the reset is pressed, and a repeat trip means an underlying fault.
• A broken dip tube: water that turns lukewarm quickly, sometimes with bits of plastic in faucet screens.
• A depleted anode: rusty hot water, a sulfur smell, and eventually a leaking tank.
• Drain or relief valve wear: a steady drip at the valve or its pipe.
• The tank itself: water from the bottom or behind the jacket, which means the end of the heater.

What a repair can and cannot replace

Elements, thermostats, the high-limit switch, the anode, the dip tube, the drain valve, the relief valve and the water connections can all be replaced. The tank, its lining and its insulation cannot. That is why age and tank condition weigh so heavily on a repair decision: putting new parts on a tank that is starting to corrode buys limited time. When replacement comes up, the overview of water heater types in Georgia is a useful starting point. Gas and tankless heaters work on different principles, covered under gas water heater service and tankless water heater service.

Roswell permits

Permits for plumbing that is installed, altered, repaired or replaced in Roswell come from the city's Building Division, and they go to contractors holding a state license or to an owner who lives in the home. The division can tell you where a given repair or a full heater replacement falls.

How it works: common questions in Roswell

Can I test a heating element myself?

With care. After the breaker is off and the wires are confirmed dead with a tester, a multimeter across the element's two terminals shows whether the coil is intact, and a check from each terminal to the tank looks for a short. If you are not certain the power is off, or the terminals look scorched, leave the testing to a technician.

What does the red reset button do?

It belongs to the high-limit switch, a safety device that cuts power to both elements if the water overheats. Pressing it, with the power off and the panel opened carefully, can restore heat after a one-time trip. If it trips again, a thermostat, element or wiring fault is usually behind it and needs testing.

Does a new anode extend an older tank's life?

It can, if the tank has not started rusting. A fresh anode takes over the corrosion again, which is why checking it every few years pays off. Once rust is coming from the tank itself or water shows at the base, a new rod will not undo the damage, and the money is better put toward a replacement.

Ask about your heater

Whether you want a symptom explained or a part replaced, call Alpha Plumbing and Sewer at (404) 409-4448 and describe what the heater in your Roswell home is doing; the symptom usually shows where to start.