Water heater leaking? Do this first.
Turn off the cold-water valve on the pipe going into the top of the heater. On a gas unit, turn the gas control to OFF; on an electric unit, switch off its breaker. Keep people and pets away from the hot water. If you smell gas, leave the house and call 911 and Atmos at 866-322-8667 (see our Mesquite gas leak page). Then call us at (682) 284-0966.
Mesquite was one of the ten original member cities when the North Texas Municipal Water District was created in 1951. Today its water starts mostly in Lavon Lake, is treated at NTMWD’s plant in Wylie and reaches homes through the city’s own mains. The city’s own FAQ says what that water does inside a tank: as it heats, calcium and magnesium settle out on the bottom, and the city’s advice is to flush the heater periodically.
Thinking about a new unit? See water heater replacement and tankless installation. For other plumbing, see plumbing services in Mesquite.
Mesquite homes and their water heaters
U.S. Census (American Community Survey 2020–2024) data counts about 54,000 homes in Mesquite, and the median dates from 1983. About 67% were built from 1950 through 1989, and about 71% are single-family detached houses. In a house that old, the original water heater has almost certainly been replaced, and each change-out was made to the code of its day.
What we check by era
The old town
About 13% of homes. Water heater closets and flues in these houses were often added or moved over the years, so we check the venting and gas connection on every call.
Bedroom community
About 28% of homes, built as Mesquite grew from 1,696 to 55,131 residents in 20 years. Expect older shutoff valves and connectors that should be replaced with the heater.
The biggest decade
About 28% of homes. Original 1980s installations are long past, but the valves, pans and drain lines around today’s heater may still be original.
Newer areas
About 31% of homes. Attic and garage installs are common, and some newer houses have tankless units that need periodic descaling.
Mesquite’s water and your tank
Mesquite water at a glance
- Supplier: the City of Mesquite, which buys treated water from the North Texas Municipal Water District (NTMWD). The main source is Lavon Lake, supplemented by Lake Texoma, Jim Chapman Lake, Lake Tawakoni and the East Fork wetland project.
- Hardness: the city describes its water as moderately hard, averaging 93 to 134 mg/L (5.44 to 7.84 grains per gallon), varying month to month. The 2025 water quality report lists total hardness of 96 to 200 ppm.
- What it does: heating drives calcium and magnesium out of the water. It settles on the tank bottom as sediment, which can cause rumbling, slower heating and particles at faucets.
- Questions about your water: Mesquite Water Utilities, 972-216-6278.
The city’s FAQ also explains a common call: small particles clogging faucet aerators and shower heads. If they look like plastic, they’re likely pieces of a worn-out dip tube, which the city recommends a licensed plumber replace. If they crumble easily, they’re mineral buildup from the tank.
Common water heater problems we fix in Mesquite
| Symptom | Likely cause | Usual fix |
|---|---|---|
| Rumbling or popping while heating | Sediment on the tank bottom | Flush the tank; replace it if sediment has damaged it |
| Plastic bits in aerators | Worn-out dip tube | Replace the dip tube |
| Hot water runs out fast (electric) | Failed element or thermostat | Test and replace the part |
| No hot water (gas) | Pilot, thermocouple, igniter or gas valve | Diagnose and replace the failed part |
| Water from the relief valve | Excess temperature or pressure, or a worn valve | Find the cause; replace the T&P valve if needed |
| Water under the tank | Fitting or drain valve leak, or a failed tank | Repair the fitting; a leaking tank means replacement |
How a Mesquite water heater repair works
Diagnose
We check the tank, venting, gas or electrical supply and safety valve, and read the date code on the data plate.
Price it
You get a written flat-rate price for repair, and for replacement if that makes more sense, before we start.
Repair
Most repairs are a part or a flush. If the tank itself is leaking, it has to be replaced.
Permit if replaced
A replacement goes under a City of Mesquite plumbing permit and gets the city’s inspection.
Mesquite permits for water heater replacement
What the City of Mesquite requires
- Permit: Mesquite requires a plumbing permit for water heater replacement. The city’s fee schedule lists water heater replacement under the residential plumbing permit.
- Who can pull it: anyone applying first registers a professional license with the city. Plumbing contractors need a master plumber license and insurance; homeowners may pull a permit only for their homestead.
- Gas units: the city can’t release gas to Atmos without an inspection, so a gas line change at the heater also goes through inspection.
- Attic installs: Mesquite’s fuel gas code requires a clear passageway to attic appliances at least 30 inches high and 22 inches wide, no more than 20 feet long, with solid flooring at least 24 inches wide and a 30-by-30-inch level service space at the front. The access opening must be at least 20 by 30 inches and large enough to remove the largest appliance.
- Contact: Building Inspection, 1515 N. Galloway Ave., 972-216-6212.
Staggs Plumbing is registered with the City of Mesquite and pulls the plumbing permit itself. If your attic heater’s access doesn’t meet the city’s rules, we’ll tell you before the replacement, not at the inspection.
Repair or replace?
- Repair when a part has failed (element, thermostat, igniter, thermocouple, gas valve, dip tube, drain valve) and the tank itself is sound.
- Replace when the tank is leaking, rusted through or badly damaged by sediment. A leaking tank can’t be patched.
- Consider tankless if you’re replacing an attic unit or want endless hot water. With Mesquite’s mineral content, a tankless unit needs periodic descaling.
Water heater trouble in Mesquite? Start here.
In this order:
- If it’s leaking, shut the cold-water valve at the top of the heater.
- Shut off the energy: gas control to OFF, or the electric breaker off.
- Smell gas? Leave the house and call 911 and Atmos at 866-322-8667.
- Move valuables away from the water and keep clear of the hot water.
- Call us at (682) 284-0966. We diagnose it and give you a written price before any work.
Mesquite neighborhoods we serve
We serve all of Mesquite, including ZIP codes 75149, 75150, 75180 and 75181: the old town around the square, the neighborhoods around Town East Mall and along I-30 and I-635, the 1980s subdivisions, and the south and east sides, including Lawson.
Our Rockwall branch is just northeast of Mesquite, so the trip to your water heater is a short one.
Mesquite water heater FAQ
Is Mesquite’s water hard?
The City of Mesquite calls its water moderately hard. Hardness averages 93 to 134 mg/L (5.44 to 7.84 grains per gallon) and varies month to month. The 2025 water quality report shows total hardness ranging from 96 to 200 ppm.
Where does Mesquite’s water come from?
Mesquite is a member city of the North Texas Municipal Water District. Its water comes mainly from Lavon Lake, with supplements from Lake Texoma, Jim Chapman Lake, Lake Tawakoni and the East Fork wetland project, and is treated at NTMWD’s plant in Wylie.
Why are there little particles in my faucets?
The city’s FAQ says plastic-looking particles are usually pieces of a worn-out water heater dip tube, which a licensed plumber should replace. Particles that crumble easily are mineral buildup from the tank, which periodic flushing helps remove.
Do I need a permit to replace a water heater in Mesquite?
Yes. Water heater replacement requires a City of Mesquite plumbing permit and inspection. Applicants register a professional license with the city first; homeowners may pull a permit only for their homestead.
Why does my water heater rumble?
Sediment. Minerals settle on the tank bottom, and water trapped under the layer flashes to steam as the burner heats it. A flush often helps; if the tank is old or leaking, replacement is the better fix.
Can you replace a water heater in my attic?
Yes. Mesquite’s code sets minimums for attic access to appliances, including the passageway, flooring, service space and opening size. We check those before we quote the job.
