Water Heater Element Leaking in Surprise, AZ: Why We Rebuilt This Electric Heater Instead of Replacing It

By Pridemark Plumbing · Licensed Arizona Contractor, ROC #319398

Rust streaking down from a side panel. A white crust around its edge. A damp drain pan under the tank. On an electric water heater, any of those can mean a water heater element leaking where it screws into the tank. If the tank itself is sound, that’s often a repair, not a new heater, and you can usually tell which one you’re facing.

In May 2026, a homeowner in the Sierra Montana neighborhood of Surprise, Arizona 85388 called Pridemark Plumbing about a leak at their five-year-old electric water heater.

Why Is My Water Heater Element Leaking?

A leaking water heater element is most often a failed seal. Each element is a long metal loop that screws into a threaded opening in the side of your tank, with a gasket, a flat rubber sealing ring, pressed between them. Water heater maker A.O. Smith says element leaks can come from failed gaskets and can be fixed. Bradford White, which made this heater, says in its service manual that over-tightening an element can damage its gasket.

Is a leaking water heater element dangerous?

Yes, a leaking element can be dangerous. Its wiring sits behind the access panel, inches from the water, and this heater’s rating label lists 240 volts. Bradford White’s owner’s manual says that at any sign of a leak around the elements, you should disconnect the power and call a qualified technician.

So if you see water at a panel, switch off the heater’s breaker and leave it off, close the cold-water shutoff valve, and set a pan under the drip. Our guide on how to turn off your water heater shows you where to look.

How Do You Tell an Element Leak From a Leaking Tank?

To tell an element leak from a leaking tank, follow the water up to where it starts. Check the top of the tank first, since a leak at the pipe fittings or relief valve up there can run down inside the outer shell to the upper panel. Crust or drips around an element’s threaded base point to its gasket. Water at the element’s two wiring screws can mean the element itself has failed.

If the insulation is soaked away from either element, or you can’t trace the water to an element, a pipe connection, the drain valve or the relief valve, the steel tank itself may be leaking. A.O. Smith says a leaking tank usually means a new heater.

Pridemark Plumbing found the answer behind the upper panel. Rust and mineral crust had built up all around the upper element’s threaded base, right where its gasket seals. Once new elements are in and the tank is refilled, dry openings are the check that settles it.

What Did We Find Inside This Sierra Montana Water Heater?

A tank that’s worth keeping, with both elements buried in scale.

What kind of water heater was this?

The heater we rebuilt is a Bradford White electric tank whose rating label lists 50 gallons, 240 volts and two 4,500-watt elements, with a maximum of 4,500 watts, so only one element heats at a time. Bradford White’s service manual says the upper element heats first when the tank is cold or during heavy use, and the lower one cycles on and off more often.

Each element has its own thermostat, the switch that turns it on and off. The upper one adds a high-limit cutoff with a red reset button that shuts the heater off if the water gets too hot. If yours trips, Bradford White says to turn off the power and call a technician.

How much scale was on the elements?

Enough to coat both of them end to end. Each loop came out covered in a rough tan crust, and the threaded bases were rusted where they’d sat in the tank.

If your tank takes longer to reheat than it used to, Bradford White’s service manual says that can usually be traced to lime buildup around the elements, and over time the buildup can burn an element out.

Why Do Water Heater Elements Get Coated in Scale?

Water heater elements scale up because heating hard water pulls its minerals out. The calcium and magnesium in hard water come out as it heats and cling to the hottest surface in the tank, which in an electric heater is the element. Rheem says that layer traps heat, so elements overheat and wear out early.

Water hardness in Surprise depends on which utility serves your street. EPCOR’s 2025 water quality report for its Agua Fria system, which covers parts of multiple West Valley cities, lists hardness of 2 to 17 grains per gallon, the unit water companies use for dissolved minerals, and calls anything over 10.5 grains very hard.

That 10.5-grain line is about the 180 milligrams per liter that the U.S. Geological Survey uses for very hard water. The City of Surprise‘s Mountain Vista system measured 2.69 to 4.85 grains per gallon in 2025.

Should You Repair or Replace a 5-Year-Old Water Heater?

A five-year-old water heater is often worth repairing if the tank itself is sound. The U.S. Department of Energy says most storage water heaters last 10 to 15 years, so a five-year-old tank with a good steel shell has a lot of life left. Here’s how we think it through with you:

• Where’s the leak? An element seal or a thermostat is a repair. A leaking tank body is a replacement.
• How old is the tank? Near the end of that 10-to-15-year range, a new heater is often the better call.
• What are your plans? Staying for years, you might weigh a new, more efficient heater. Selling soon, a sound repair usually makes more sense.

Here, the first two answers settled it: a five-year-old tank that was still sound, and a leak at an element seal. When the tank is the problem, we’ll tell you that too, like we did on the gas water heater we replaced in Marley Park.

What Does Replacing Water Heater Elements and Thermostats Involve?

Replacing elements and thermostats means draining the tank, swapping the parts and refilling it, in that order. Here’s how we rebuilt this one, so you know what’s involved:

1. Shut off the power and the water. We switched off the heater’s breaker and closed the cold-water supply.
2. Drained the tank through the drain valve at the bottom.
3. Opened both access panels, disconnected the wiring, and removed both old thermostats and both elements.
4. Flushed out the sediment settled in the bottom of the tank, so the new lower element wouldn’t start out sitting in it.
5. Installed two new elements and sealed both openings.
6. Installed two new thermostats, upper and lower, and rewired both compartments.
7. Refilled the tank completely before we turned the power back on.
8. Put a Pridemark service sticker on the front listing the new elements, the new thermostats and the flush.

Should you replace both water heater elements at the same time?

On this heater, yes, and it’s worth asking about on yours. As the top photo shows, both elements carried the same scale. With the tank already drained, replacing both elements and both thermostats in one visit meant the whole heating side started fresh.

What Changes After New Elements, Thermostats and a Sediment Flush?

The leak stops, and the heater runs on fresh parts. The upper opening has a new seal, the elements heat the water instead of a crust of scale, both thermostats are new, and the sediment is out of the tank.

That sticker is a record of what we replaced and when, for you, your next plumber, or a home inspector down the road.

How Do You Keep Scale Off New Water Heater Elements?

Treat the water, and drain the tank on schedule. Those were our two recommendations here, both the homeowner’s call.

A water softener takes out the calcium and magnesium before the water reaches your heater. More on our water softener and treatment page.

One trade-off: Bradford White says softened water can wear out the anode rod faster. That’s the metal rod inside the tank that corrodes so the steel doesn’t, and the manual calls for inspecting it every two years, more often with a softener.

Draining is the other half. Bradford White’s manual for this heater says to drain it at least once a month through the drain valve until the water runs clear, and to have a qualified technician inspect it at least once a year. That’s more often than Rheem’s general advice to flush once a year, or every six months with hard water, so follow the manual for the brand you own.

The yearly visit under our Service Agreement includes flushing sediment out of your water heater. For a gas tank, see the Sarah Ann Ranch flush that turned up 90 PSI.

When Should You Call a Plumber for a Leaking Water Heater Element?

Call a plumber as soon as you see water at a panel. Bradford White’s owner’s manual says not to attempt repairs to thermostats, heating elements or wiring, and to leave them to a qualified service technician.

The job means draining the tank below the element, seating a new gasket flat, and filling the tank all the way before the power comes back on, because an element powered with no water around it, called dry firing, fails within seconds. The manual is blunt about it: “Failure of the element(s) due to dry-firing is not covered by warranty.”

A plumber also checks whether the tank’s sound and whether repair or replacement fits your plans. That’s how we handle every water heater repair and service call, as part of our plumbing services in Surprise, AZ.

Questions Homeowners Ask About Leaking Water Heater Elements

Can a leaking water heater element be fixed without replacing the tank?

Often, yes, if your tank itself is sound. A.O. Smith says element leaks can come from failed gaskets and can be fixed, while a leaking tank body usually means a new heater. In May 2026, Pridemark Plumbing fixed a leak at the upper element of a five-year-old electric water heater in Surprise, AZ, with new elements and thermostats.

Do both elements in an electric water heater heat at the same time?

Not on the Bradford White Pridemark Plumbing rebuilt in May 2026. Its rating label lists two 4,500-watt elements but a maximum of 4,500 watts, so only one runs at a time. If your label lists a maximum equal to one element’s wattage, yours works the same way.

Can I replace a water heater element without draining the tank?

Not according to Bradford White. Its service manual says to turn off the power and the cold-water supply, then drain the tank to a point below the element before it comes out. The old gasket shouldn’t be reused, and your tank must be completely full before the power goes back on. The owner’s manual leaves that work to a qualified service technician.

Is it worth repairing a water heater instead of replacing it in Surprise, AZ?

Often, if the tank is sound and has years left. The U.S. Department of Energy says most storage water heaters last 10 to 15 years. Hard water can wear out elements well before the tank, so a five-year-old heater with a leaking element seal is usually a good candidate for repair. A rusted-through tank isn’t.