Get answers to common questions about water heater repair, replacement, and installation near you. Can't find your answer? Call us for free phone help.
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Follow these steps to troubleshoot your electric water heater:
Follow these steps to troubleshoot your gas water heater:
Popping or rumbling sounds are typically caused by sediment buildup at the bottom of the tank. This is common in older units and in areas with hard water. Loud banging or knocking could indicate a more serious pressure issue. If you hear hissing or whistling, call us immediately at 704-960-2050 as this could indicate a gas leak or dangerous pressure buildup.
Rusty or brown water usually means the anode rod inside your tank has corroded, and the tank itself may be rusting. This is often a sign your water heater needs replacement soon. If the discoloration only occurs with hot water (not cold), the water heater is almost certainly the source. Call us for a free assessment.
Unfortunately, water heater tanks are glass-lined and cannot be repaired once they develop a leak at the bottom. A bottom leak means the inner tank has corroded through, and the only solution is a full replacement. The good news is we offer same-day water heater replacement throughout the Charlotte area - we can often have you back in hot water within hours.
If your hot water runs out faster than it used to, common causes include: a failing heating element (electric units), sediment buildup reducing tank capacity, a broken dip tube, or a thermostat issue. It could also mean your household hot water demand has increased. We can help you determine if repair or replacement with a larger unit makes more sense. For unlimited hot water, consider a tankless water heater.
A sulfur or rotten egg smell from your hot water is almost always caused by a reaction between sulfate bacteria in the water and the magnesium or aluminum anode rod inside your tank. The bacteria are harmless but produce hydrogen sulfide gas, which creates the odor. The fix is usually replacing the anode rod with a zinc or aluminum/zinc alloy rod, or flushing and disinfecting the tank. If the smell appears suddenly in both hot and cold water, contact your water utility instead — that points to a source water issue, not the water heater.
A dripping T&P (temperature and pressure relief) valve should never be ignored. It means the valve is either failing and needs replacement, or more seriously, that the water inside the tank is overheating or building excessive pressure. Either condition is a safety issue. Do not cap or plug the drain line — that is extremely dangerous. Call us at 704-960-2050 right away for a same-day evaluation.
A leak at the top of the water heater is often repairable, unlike a bottom leak. Top leaks are commonly caused by loose inlet/outlet connections, a failing pressure relief valve, or a corroded fitting — all of which can be fixed without replacing the whole unit. Call us and describe exactly where the water is coming from so we can give you an honest assessment over the phone.
Key signs it's time for a replacement include: your unit is 8-12 years old, you see rust or corrosion on the tank, it's leaking from the bottom, hot water runs out faster than usual, you hear loud rumbling or popping noises, or your energy bills have increased significantly. If you're experiencing any of these, call us at 704-960-2050 for a free phone consultation.
Most standard tank water heater replacements take 1-3 hours from start to finish. We handle everything: draining the old unit, disconnecting and removing it, installing the new one, and hauling away the old water heater for recycling. Tankless water heater installations may take a bit longer if gas line or venting modifications are needed.
We install top-quality brands including Rheem, Bradford White, A.O. Smith, and Ruud for tank water heaters, and Navien, Rinnai, Noritz, and Takagi for tankless systems. We'll recommend the best brand and model for your home's specific needs, budget, and hot water demand.
We strongly advise against DIY water heater installation. It involves working with natural gas or high-voltage electricity, heavy lifting (water heaters weigh 150+ lbs empty), and complex plumbing connections. DIY installation voids manufacturer warranties, may void your homeowner's insurance, and can create serious safety hazards. Professional installation from a licensed plumber ensures your investment is protected.
Our all-inclusive installation includes: the new water heater unit, all necessary fittings and connections, flexible water lines, removal and recycling of your old unit, a full system test, and cleanup. Sales tax is included in the quoted price. What we quote is what you pay - no hidden fees or surprise charges.
A complete tank water heater replacement in Charlotte — including the unit, all parts, labor, haul-away, and tax — typically runs $1,295 to $1,995 depending on tank size and whether any code upgrades are needed. Tankless water heater installation typically starts around $3,495. We give you a firm price upfront before any work begins. There are never any hidden charges.
Yes. A plumbing permit is required for water heater replacements in North Carolina, including Mecklenburg County and all surrounding counties. We handle the permit process on your behalf — it's included in our installation. Never hire a contractor who tells you a permit isn't needed for a water heater replacement in NC. Working without a permit can cause problems when you sell your home.
Traditional tank water heaters typically last 8 to 12 years. Tankless water heaters last 20 or more years with proper maintenance. The number one factor that shortens water heater life in the Charlotte area is the local water quality — moderately hard water accelerates sediment buildup and anode rod corrosion. Regular flushing (annually for tank units) can extend the life of your unit significantly.
For tank water heaters, the general rule is: 1-2 people = 30-40 gallon, 3-4 people = 40-50 gallon, 5+ people = 50-80 gallon. However, usage patterns matter more than headcount alone — if multiple people shower in the morning or you have a large soaker tub, size up. For tankless systems, sizing is based on flow rate (gallons per minute) and the temperature rise needed, not tank capacity. We'll recommend the exact right size during your free phone consultation.
Sometimes. Thermostats, heating elements, anode rods, T&P valves, and gas control valves can often be repaired or replaced at lower cost than a full unit. However, if the tank itself is leaking, the unit is more than 10 years old, or repair costs would exceed 50% of replacement cost, replacement almost always makes more financial sense. We'll always give you an honest recommendation — we don't push replacement if a repair is the right call.
A tank water heater stores 40-80 gallons of hot water and keeps it heated continuously. A tankless (on-demand) water heater heats water only when you turn on a faucet, providing an endless supply of hot water. Tankless units are more energy-efficient (saving 20-30% on energy bills), last longer (20+ years vs. 8-12), and take up much less space. However, they have a higher upfront cost.
For many homeowners, absolutely. Tankless water heaters from Navien and Rinnai can save 20-30% on water heating costs, last 20+ years compared to 8-12 for tank units, provide unlimited hot water, and take up significantly less space. They're especially valuable for larger families or homes with high hot water demand. We can help you calculate your potential savings.
Yes! We regularly convert homes from tank to tankless systems. The installation may require some additional work like upgrading the gas line, adding a dedicated venting system, or running a new electrical circuit. We'll evaluate your home and provide a complete quote with everything needed for the conversion.
All three are excellent and we install all of them. Navien is our most-installed brand — they build some of the most efficient units on the market, have outstanding warranty support, and their condensing technology extracts more heat from the same amount of gas. Rinnai has been making tankless heaters longer than almost anyone and is bulletproof reliable. Noritz offers excellent value. The best brand for your home depends on your gas supply, hot water demand, and budget. We'll walk you through the specific differences during your consultation.
Yes. Tankless water heaters should be flushed annually to remove mineral scale from the heat exchanger, especially given Charlotte's water quality. Neglecting this can reduce efficiency and eventually cause the unit to fail. Most manufacturers require annual descaling to maintain the warranty. We offer maintenance flushes and can walk you through doing it yourself.
No — even gas tankless water heaters require electricity to power the control board, ignition, and fan. During a power outage, a gas tankless unit will not function. Traditional gas tank water heaters with a standing pilot light (older models) will work without power, but most modern units with electronic ignition also require electricity.
We offer free phone troubleshooting and consultations. Call us at 704-960-2050 and we can often diagnose your issue and provide pricing right over the phone - no need to schedule a visit first. If we need to see your setup for a complex installation, we'll work with you on a convenient time.
Yes! Same-day service is our specialty. We keep water heaters stocked and ready to install, so in most cases we can replace your water heater the same day you call. No waiting days without hot water. We serve the entire Greater Charlotte area including Concord, Huntersville, Matthews, Gastonia, and all surrounding communities.
We serve the Greater Charlotte NC area within a 50+ mile radius, including Charlotte, Concord, Cornelius, Denver, Gastonia, Harrisburg, Huntersville, Indian Trail, Kannapolis, Matthews, Midland, Mint Hill, Mooresville, Pineville, Salisbury, Statesville, Troutman, and many surrounding communities. If you're unsure if we cover your area, call us at 704-960-2050.
Yes, we offer 24/7 emergency water heater service for situations like major leaks, gas smell, or no hot water. Charlotte winters don't wait, and neither do we. Call 704-960-2050 anytime - we'll get you taken care of as fast as possible.
Yes, Water Heater Express is fully licensed and insured. We carry comprehensive liability insurance and all work is performed to local building codes. We're a family-owned business operated by Matt and Josh, serving the Greater Charlotte community with honest, reliable water heater service.
Every water heater we install includes the manufacturer's warranty — typically 6 to 12 years on the tank for residential units, depending on the model. We also warranty our labor. If anything goes wrong with our installation workmanship, we come back and fix it at no charge. We'll give you all warranty documentation at the time of installation.
We're straightforward about our pricing — call us and we'll tell you exactly what your situation costs before we come out. We do not believe in surprise fees after the work is done.
Yes. We understand a water heater replacement can be an unexpected expense. We work with financing options to help make same-day replacement accessible. Call 704-960-2050 and ask about current financing availability.
Yes, someone 18 or older needs to be present for the installation. We need access to the water main shutoff, the electrical panel or gas shutoff, and we'll need your approval before we begin work. Most installations take 1-3 hours so it's a minimal time commitment.
For a gas water heater: turn the gas control valve knob to the 'Pilot' or 'Off' position, then shut the gas supply valve on the gas line (turn the handle perpendicular to the pipe). For an electric water heater: go to your breaker panel and flip the water heater breaker to OFF. For either type, if water is actively leaking, also turn off the cold water supply valve at the top of the unit. Then call us at 704-960-2050.
The U.S. Department of Energy recommends 120°F as the ideal setting — hot enough to kill most bacteria, cool enough to reduce scalding risk and minimize energy use. Setting your water heater above 120°F wastes energy and accelerates tank corrosion. If anyone in your home is immunocompromised or over 60, 120°F is especially important to prevent Legionella bacteria growth, which thrives between 77°F and 113°F.
Look at the connections at the top or bottom of the unit. If you see a black iron or yellow flexible gas pipe running into the water heater, it's gas. If you see two large electrical wires entering the unit (often through a junction box or conduit) and no gas pipe, it's electric. Gas units also have a visible control valve on the front with a dial marked Pilot/On/Off. Electric units have a flat access panel over the thermostat and element.
Tank water heaters should be flushed once a year to remove sediment buildup from the bottom of the tank. In areas with hard water — like much of the Charlotte metro — annual flushing is especially important. Sediment buildup reduces efficiency, causes the popping and rumbling sounds many homeowners notice, and significantly shortens tank life. Tankless water heaters need an annual descaling flush of the heat exchanger, which requires a pump, vinegar solution, and about 45 minutes.
Over time, dissolved minerals in the water — primarily calcium and magnesium — settle to the bottom of your tank as sediment. This sediment layer insulates the water from the burner (gas) or heating element (electric), forcing the unit to work harder and longer to heat the same amount of water. Flushing drains the tank and removes that sediment layer, restoring efficiency and reducing wear on the element or burner.
The anode rod is a magnesium or aluminum rod suspended inside the tank that attracts corrosive elements in the water through a process called electrolytic action — essentially sacrificing itself so the tank doesn't corrode. Once the anode rod is depleted, corrosion moves to the tank itself. Anode rods should be inspected every 3-4 years and replaced when they're depleted. Replacing an anode rod is one of the best ways to extend the life of your water heater by years.
Older water heaters (pre-2004) can benefit from an insulating jacket that wraps around the tank, reducing standby heat loss. Modern water heaters already have excellent foam insulation built in, so adding external insulation provides little benefit and can actually interfere with the thermostat or air intake on gas units. A more effective upgrade for energy savings is switching to a tankless unit, which eliminates standby heat loss entirely.
For a trip of 1-2 weeks, simply set your water heater to the 'Vacation' mode or lowest temperature setting — no need to drain it. For extended absences (a month or more), it's worth having us drain the unit to prevent sediment settling during the long idle period and to save energy. When you return, we can also flush and inspect it before you start using it again.
If the leak is minor and coming from a fitting at the top, the water itself is typically safe to use briefly while you wait for service. However, you should turn off the power or gas to the unit immediately, as a leaking water heater running on electricity or gas is a hazard. If water is visibly pooling on the floor, turn off the cold water supply valve to the unit. Do not run appliances or anything requiring large amounts of hot water — this accelerates the leak.
Do not touch any switches, outlet covers, or the water heater itself. Do not turn lights on or off. Leave the house immediately with your family and pets. Once outside and away from the building, call your gas company's emergency line (Piedmont Natural Gas: 800-752-7504) and call 911. Do not re-enter the building until the gas company clears it. Gas leaks near water heaters can be caused by a failing gas valve, a loose connection, or a cracked supply line.
A leaking water heater is always serious and needs same-day attention. Risks include: water damage to floors and ceilings below, mold growth within 24-48 hours of water intrusion, electrical hazards if water contacts wiring or outlets, and — in rare cases involving gas units — an explosion risk if the T&P valve fails and pressure builds unchecked. A bottom tank leak will worsen rapidly once it starts. Call us immediately at 704-960-2050.
The temperature and pressure (T&P) relief valve is the most important safety device on your water heater. If the thermostat fails and water overheats, or if pressure inside the tank exceeds safe limits, the T&P valve opens automatically to release pressure and prevent a catastrophic tank failure. T&P valves should be tested once a year — lift the lever briefly to confirm water flows from the drain pipe. If the valve drips after testing or won't reset, it needs immediate replacement.
Call us for free phone troubleshooting. We're happy to help you figure out what's going on with your hot water heater - no charge, no obligation.
