Water Heater Repair and Installation in Marietta, Georgia – Marietta Plumbing Pros

Marietta Plumbing Pros handles every type of water heater service for homeowners throughout Marietta, Georgia and the surrounding Cobb County communities. Whether you need same day water heater repair for a unit that stopped working overnight, a full water heater replacement, a new tankless water heater installation, a gas water heater pilot light diagnosis, or help deciding whether to repair or replace an aging unit, we have the experience and equipment to handle it correctly. We serve Marietta as well as Kennesaw, Smyrna, Acworth, Powder Springs, Austell, and Mableton, so the entire northwest metro Atlanta region is covered. A significant number of the homes we work in around Marietta were built in the 1960s and 1970s, and the hard water common to this part of Cobb County affects water heater performance and longevity in ways that matter when you are trying to decide whether a repair is still worth doing. We take time with diagnostics before recommending anything, and we clean up thoroughly and explain everything in plain terms before we leave. Here is a complete look at the water heater services we provide in Marietta.

Common Water Heater Problems We Fix in Marietta

No Hot Water or Insufficient Hot Water

Running out of hot water faster than you should, or finding no hot water at all, is one of the most disruptive plumbing problems a Marietta household can face. For a family getting ready for school and work in the morning, a water heater that cannot keep up is a genuine daily problem. The cause can range from a failed heating element on an electric unit to a tripped thermostat, a gas supply issue, or a water heater that has simply reached the end of its effective life after years of sediment accumulation from Marietta’s moderately hard water.

Recognizing the Problem

• Hot water runs out after one or two showers when it used to last the whole household
• Water never reaches a comfortable temperature even after running for several minutes
• No hot water at all from any fixture in the home
• Hot water arrives more slowly than it used to from fixtures near the water heater
• The water heater runs constantly but cannot seem to maintain a set temperature
• Inconsistent temperatures where water is briefly hot then suddenly cold
• Electric water heater trips the breaker when it runs

Diagnosing a no hot water situation in a Marietta home starts with identifying whether the unit is even attempting to heat. For gas units, we check the pilot, thermocouple, gas valve, and burner assembly. For electric units, we test the heating elements and thermostats. For tankless water heaters that are not heating, we check the heat exchanger, flow sensor, error codes, and gas or electrical supply. Once we know what failed, we repair or replace the component or the unit, depending on what makes the most practical sense given the unit’s age and overall condition.

Leaking Water Heater

A water heater that is leaking is both a water damage risk and a signal that the unit itself may be failing internally. Where the leak comes from tells us a great deal about what is actually wrong. A leak from around the temperature and pressure relief valve, for example, is different from a leak at the cold water inlet connection, and a unit leaking from the tank body itself is a fundamentally different situation from either of those.

Recognizing the Problem

• Water pools around the base of the tank without any obvious source above
• The temperature and pressure relief valve is dripping or running continuously
• Water drips from the pipe connections at the top of the tank
• Rust stains appear on the outside of the tank or on the floor beneath it
• The pressure relief discharge pipe is releasing water into the drain
• Condensation on a new or recently installed unit during the first few days of operation
• A slow drip from a supply line or flex connector at the water heater

We approach a leaking water heater with a structured inspection that covers every connection, valve, and the tank body itself before drawing conclusions. A loose supply connection is a straightforward fix. A failed relief valve is a repair that also warrants checking the system pressure, because a relief valve that discharges regularly is often doing so because something else is causing pressure to exceed safe limits. A tank leaking from the body itself is a replacement situation in almost every case, as internal corrosion that has progressed to a leak will continue to worsen. Water heater leaking from the bottom in a Marietta home is one of the clearest signs a replacement is needed.

Tankless Water Heater Issues

Tankless water heaters have become increasingly common in Marietta over the past decade as homeowners look for better efficiency and an unlimited hot water supply. But tankless units are more complex than traditional storage tanks, and when they develop problems they often show it in ways that require specific diagnostic knowledge. Error codes, ignition failures, cold water sandwiches, and scale buildup in the heat exchanger from Marietta’s hard water are among the most common issues we resolve.

Recognizing the Problem

• Tankless unit displays an error code and shuts down during a hot water demand
• Water temperature fluctuates during a shower, alternating between warm and cold
• Unit ignites but shuts off before providing consistent hot water
• Longer and longer wait times for hot water to arrive at fixtures near and far from the unit
• Reduced flow rate from hot water fixtures since the unit was installed or last serviced
• Unit makes unusual clicking, grinding, or beeping sounds during operation
• Scale buildup visible at the water connections or around the unit’s venting

Tankless water heater repair in Marietta requires familiarity with the major brands and their specific diagnostic systems. We work on Rinnai, Navien, Noritz, Rheem, and other common brands and carry the equipment to read error codes, test flow sensors and ignition systems, and descale heat exchangers that have accumulated mineral buildup. Marietta’s water chemistry does accelerate scale buildup in tankless units faster than in softer water areas, which is why annual or bi-annual descaling maintenance is genuinely worth doing here. When a tankless unit is not heating properly, an accurate diagnosis is what separates a targeted repair from an unnecessary replacement.

Rusty or Discolored Hot Water

Discolored water from the hot side of any fixture is not something to ignore. Rust-colored or brownish hot water in a Marietta home almost always means either the water heater’s anode rod has been depleted and the tank interior has begun to corrode, or the hot water pipes leading from the heater are themselves corroding internally. Either way, the water coming through the system has picked up particles and minerals that it should not carry.

Recognizing the Problem

• Hot water has a brown, orange, or reddish tint, especially first thing in the morning
• Hot water smells metallic or has a slightly off taste
• Discoloration appears only from hot taps, not from cold water fixtures
• Laundry washed in hot water comes out with rust or orange stains
• Sediment particles are visible when hot water is collected in a clear container
• The water heater is more than eight to ten years old and has never had anode rod service
• The hot water pressure has also declined alongside the discoloration

We diagnose rusty hot water by first testing whether the issue is confined to the hot side or affects both supply lines, which helps isolate whether the source is the water heater or the pipe network. If the water heater tank is the source, we assess whether the anode rod replacement and a flush can extend the unit’s life or whether the corrosion has progressed far enough that the unit should be replaced. Older Marietta homes with original galvanized hot water distribution pipes add a layer of complexity because both the tank and the pipes may be contributing simultaneously.

Strange Noises from Water Heater

A water heater that pops, rumbles, hisses, or bangs during operation is trying to communicate that something inside needs attention. These sounds are almost always related to sediment, pressure fluctuations, or thermal expansion, and they tend to get worse over time if left unaddressed. In Marietta homes where hard water has accelerated sediment accumulation inside the tank, noise problems often develop faster than homeowners in softer water areas would expect.

Recognizing the Problem

• Loud popping or crackling sounds during or after a heating cycle
• Rumbling or boiling sounds from inside the tank during heating
• Hissing or sizzling noise that suggests water contacting a hot surface or escaping under pressure
• Banging or knocking sounds when hot water is drawn from fixtures
• Ticking or clicking that intensifies during heating and stops when the cycle ends
• High-pitched whistling during or after the unit fires
• Sounds were absent when the unit was new and have developed gradually over months or years

The most common cause of popping and rumbling in a Marietta water heater is sediment that has built up on the bottom of the tank. Water trapped beneath this sediment layer heats unevenly, creating the popping and bubbling sounds as steam escapes through the sediment layer. A thorough flush can address early-stage sediment buildup, but in units that have been running without maintenance for many years, the sediment may be too compacted to remove fully through flushing alone. We assess the unit’s overall condition during the service visit and give you an honest picture of whether the flush resolved the issue or whether replacement is the more practical path forward.

Pilot Light Problems (Gas Water Heaters)

A gas water heater pilot light that will not stay lit is one of the more frustrating problems homeowners deal with because it often requires repeated relighting attempts before the pattern of failure becomes clear. The most common culprit is a worn thermocouple, which is the safety component that senses whether the pilot is burning and allows the gas valve to remain open. When the thermocouple fails or weakens, it incorrectly signals the gas valve to close, extinguishing the pilot even when everything else is fine.

Recognizing the Problem

• Pilot light relights successfully but goes out again within seconds or minutes
• Pilot light cannot be lit at all despite following the correct lighting sequence
• Gas water heater has no hot water and no sound of the burner firing
• Pilot flame is weak, yellowish, or flickers rather than burning steady blue
• Control knob turns but the burner does not engage after the pilot is confirmed lit
• A faint gas odor is present near the water heater when attempting to light
• Older unit where the pilot has gone out repeatedly over the past year

If you smell gas or suspect a gas leak, go outside immediately and call 911 – this is a serious emergency that needs urgent attention from the gas company. For pilot light problems that do not involve a gas smell, we inspect the thermocouple, the gas valve operation, the pilot orifice, and the venting system to make sure combustion air is adequate. Gas water heater pilot light repair in Marietta is often a straightforward thermocouple replacement, but an accurate diagnosis ensures we are fixing what actually failed rather than replacing parts by process of elimination.

Water Heater Not Turning On

A water heater that shows no signs of operation at all, whether gas or electric, has usually experienced a component failure that cuts off its ability to begin a heating cycle. For electric units, the most common cause is a tripped high-limit reset or a failed heating element. For gas units, a faulty gas valve or a control board failure can prevent the unit from responding at all. Tankless water heaters have their own set of control failures that can result in complete non-response even when water flow is present.

Recognizing the Problem

• No heat from the water heater at all, with no sounds of the unit attempting to fire
• Electric water heater has tripped the dedicated circuit breaker
• The reset button on an electric unit trips repeatedly as soon as it is pressed
• Gas water heater control dial turns but no pilot or burner engagement occurs
• Tankless unit shows no power or display when a hot water demand is present
• A burning smell comes from the unit before it stopped working entirely
• The unit is several years old and this is the first time it has completely stopped operating

Complete non-operation requires a systematic diagnostic approach because the failure point could be anywhere in the sequence from power or gas supply through the control system to the actual heating components. We test the supply first, then work through the control components and finally the heating elements or burner assembly. In many cases, a non-operating water heater in a Marietta home is recoverable with a targeted repair. In others, particularly older units where the control board itself has failed, the repair cost versus the cost and benefit of a replacement is a conversation worth having before committing to parts.

Sediment Buildup and Poor Performance

Sediment accumulation inside a water heater tank is one of the most common and most preventable causes of reduced performance and shortened unit lifespan in Marietta. The minerals naturally present in the water supply, particularly calcium and magnesium, precipitate out of water during the heating process and settle at the bottom of the tank. Over time this layer grows, acts as insulation between the burner and the water, and forces the unit to run longer and harder to achieve the same heating result.

Recognizing the Problem

• Hot water does not seem as hot as it used to be despite the thermostat being unchanged
• Water heater runs noticeably longer during each heating cycle than it previously did
• Energy bills have risen without an obvious change in household hot water usage
• Popping or rumbling sounds during heating cycles, consistent with trapped water under sediment
• Reduced hot water volume before the unit runs cool, even with a full tank
• The unit has not been flushed in several years despite regular use
• Visible scale or mineral deposits around the drain valve or supply connections

Annual flushing is the standard recommendation to manage sediment in Marietta water heaters, and in areas with harder water that interval should probably be shorter for units that have not been maintained regularly from the beginning. We flush water heaters as a standalone service and also as part of a full service visit when we are on site for another repair. For units with years of compacted sediment at the bottom of the tank, we assess whether a flush will meaningfully improve performance or whether the sediment layer has reached the point where the unit needs to be replaced to restore reliable operation.

Water Heater Repair vs Replacement in Marietta

The decision between repairing and replacing a water heater is one we help Marietta homeowners work through honestly on almost every service call involving an older unit. There is no universal right answer, but there are clear indicators that push the decision clearly in one direction.

A unit that is less than seven or eight years old with a single identifiable failed component, such as a thermocouple, heating element, or pressure relief valve, is almost always worth repairing. The repair cost is modest relative to a full replacement, and a properly functioning unit in that age range still has meaningful life ahead of it.

A unit that is ten or more years old, particularly in a Marietta home where hard water has been accelerating internal wear, requires a more careful calculation. If the unit is within a few years of the end of its typical lifespan and the repair involves a significant component like a gas valve or control board, the math often favors replacement. You spend less over the next few years, you get the efficiency benefits of a newer unit, and you avoid the disruption of another emergency call in eighteen months.

A tank that is actively leaking from the body itself is always a replacement. There is no repair for a tank that has corroded through to the point of releasing water. The internal damage is irreversible and the unit is past the point where any amount of service work makes sense.

Rust-colored hot water from an older unit combined with reduced capacity is another clear replacement signal. A tank that has lost its anode rod effectiveness and begun to corrode internally is nearing the end of its reliable operating life, and the water quality problem will not be resolved with anything short of a new tank or a full repipe of the hot water distribution system if older galvanized pipes are also contributing.

For Marietta homeowners who are on the fence, we provide a straightforward breakdown of what the repair costs versus what a replacement would cost over the unit’s next expected service period. We do not push either direction, but we give you enough information to make the decision with confidence.

Tankless Water Heater Installation and Repair

Tankless water heaters make a compelling case for many Marietta households. Unlike storage tanks that keep 40 to 80 gallons of water perpetually hot, a tankless unit heats water only when it is demanded, which eliminates standby heat loss and can meaningfully reduce energy consumption over time. For households that have more than two or three people drawing hot water in overlapping patterns, a properly sized tankless unit also eliminates the problem of running out of hot water entirely.

The key word in that last sentence is properly sized. A tankless unit that is undersized for the household’s peak demand will not outperform the storage tank it replaced, and this is one of the most common reasons Marietta homeowners are disappointed with a tankless installation done by someone who did not calculate the demand correctly. We assess your home’s peak hot water usage across all simultaneous demand points before specifying a unit size and type.

Gas tankless units require adequate gas supply pressure and the right line diameter to support peak demand. Many older Marietta homes need a gas line upgrade alongside a tankless installation. We handle both as part of the installation project so the unit operates at its rated capacity from day one. Electric tankless units have their own set of requirements around panel amperage and dedicated circuit capacity that we verify before committing to an installation plan.

For Marietta homeowners who already have a tankless unit that is not performing as expected, we diagnose and repair all major brands including Rinnai, Navien, Noritz, Rheem, and Bradford White. We also recommend annual or bi-annual descaling maintenance for Marietta installations because the local water hardness accelerates scale buildup in heat exchangers more than in softer water areas. A well-maintained tankless unit in a Marietta home can last significantly longer than a storage tank, which makes the investment worth protecting with regular service.

Water Heater Installation Services in Marietta

New water heater installation in a Marietta home involves more than setting the unit in place and making connections. A proper installation ensures the unit is correctly sized, properly vented, safely connected to gas or electricity, compliant with local codes, and set up with all the safety components functioning as designed.

We start by confirming the replacement unit is the right size for the household. A 40-gallon tank that was adequate for a two-person household may not keep up if the household has grown. A unit that is significantly oversized runs inefficiently. We match the capacity to the actual demand pattern of your home.

For gas water heaters, we verify the existing gas line sizing and connection point, check the venting path for clearance and proper pitch, and confirm the gas shutoff valve and flex connector are in good condition. For electric units, we verify the breaker size and wiring gauge. Both types require a properly installed and functioning temperature and pressure relief valve with a discharge pipe that routes to a safe termination point.

For tankless installations, we handle any required gas line modifications, new venting through the wall or ceiling, and any electrical work needed for the unit’s control system. After installation, we run the unit through a full commissioning sequence to verify ignition, temperature response, and flow performance before we consider the job complete.