Our Core Services

• Water Heater Installation & Replacement: Sizing and installing gas, electric, and hybrid heat-pump water heaters to meet your household's exact demand.

• Tankless Water Heater Upgrades: Converting outdated tank systems to high-efficiency, on-demand tankless water heaters for endless hot water and lower energy bills.

• Emergency Repair Services: Fast diagnostics and repairs for failing heating elements, tankless error codes, faulty thermostats, pilot light issues, and leaking valves.

• Preventative Maintenance: Annual tank flushing, tankless de-scaling & annual maintenance, anode rod inspections, and system tune-ups to extend the lifespan of your unit.

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Frequently Asked Questions (Homeowner Troubleshooting Guide)

 

Do you repair and install water heaters near me? 

Yes. All Hot Water LLC is based locally in Seneca, SC, and we serve a 30-mile radius across the Upstate. Our primary service areas include Seneca, Clemson, Anderson, Walhalla, Westminster, Pendleton, and the surrounding communities.

 

Why is my water heater leaking? 

A leaking water heater requires immediate attention, but the source of the leak determines if it can be fixed. If the leak is coming from the top (water connections) or the drain valve at the bottom, we can usually repair it by tightening or replacing the fittings. However, if the tank itself is leaking from the bottom due to internal rust and corrosion, the unit cannot be repaired and must be replaced immediately to prevent water damage to your home.

 

How do I know if my water heater needs to be repaired or replaced? 

If your traditional water heater is over 10 years old, has visible rust around the base, or the tank itself is leaking, it is time for a replacement. If your unit is newer and you are simply experiencing a lack of hot water, it is often a repairable issue, such as a failed heating element, a broken thermostat, or a tripped breaker.

 

Why does my water heater make a popping or rumbling noise? 

Popping, rumbling, or knocking noises sound alarming, but they are very common. This noise is caused by a buildup of hard water sediment and calcium at the bottom of the tank. As the water heater turns on, water trapped beneath this layer of sediment begins to boil and bubble up—much like a boiling pot of water with a lid on it. We can usually fix this by performing a thorough system flush.

 

Why is my hot water brown, yellow, or rusty? 

Discolored hot water is a strong indicator of rust. If only your hot water is discolored (not your cold water), the inside of your water heater tank is likely rusting. This happens when the internal sacrificial "anode rod" has completely degraded. If caught early, we can replace the anode rod and flush the tank. If left too long, the tank will rust through and require replacement.

 

How long does a standard water heater last? 

A traditional tank-style water heater (gas or electric) typically lasts between 8 to 12 years, depending on your local water quality and how often it is maintained. Tankless water heaters have a significantly longer lifespan and can easily last 15 to 20 years or more with routine descaling.

 

How often should I flush my water heater? 

Manufacturers recommend flushing your water heater once a year. Annual flushing removes the sediment and mineral buildup that naturally occurs inside the tank, especially with the hard water we sometimes see in the Upstate SC area. Regular flushing improves energy efficiency and extends the life of your unit.

 

What size water heater do I need for my house? 

Sizing depends on the number of bathrooms and occupants in your home. Generally, a household of 1 to 2 people needs a 30- to 40-gallon tank. A home with 3 to 4 people typically requires a 50-gallon tank, while larger families may need an 80-gallon tank or two standard tanks plumbed together. For endless hot water regardless of family size, we highly recommend looking into a tankless system.

 

How much does a new water heater installation cost? 

The cost of installation varies based on the size of the unit, whether it is gas or electric, and whether we need to bring older plumbing up to current code (such as adding an expansion tank or new venting). Because every home is different, All Hot Water LLC offers transparent, upfront estimates for homes throughout the Seneca area before any work begins.

 

Do I need an expansion tank on my new water heater? 

In most cases, yes. Modern plumbing codes in South Carolina frequently require a thermal expansion tank if your home operates on a "closed-loop" water system (like having a pressure reducing valve on your main water line). The expansion tank safely absorbs excess pressure created when cold water is heated and expands, protecting your plumbing fixtures and the water heater itself.

 

Why won't the pilot light stay lit on my gas water heater? 

If your gas water heater's pilot light keeps going out, the most common culprit is a dirty or faulty thermocouple. The thermocouple is a safety device that senses the pilot flame and keeps the gas valve open. If it fails, it shuts off the gas as a safety precaution. It could also be a dirty pilot tube or a drafting issue, both of which our technicians can quickly diagnose and repair.

 

My hot water smells like rotten eggs, how do I fix this? 

A rotten egg or sulfur smell in your hot water is caused by anaerobic bacteria in your water reacting with the magnesium or aluminum anode rod inside your tank. This is not dangerous, but it is unpleasant. We can fix this by flushing and sanitizing the tank, and replacing the standard anode rod with a specialized zinc-alloy or powered titanium anode rod.

 

Can you convert my electric water heater to a gas or tankless system? 

Yes! We frequently help Seneca homeowners upgrade from standard electric tanks to high-efficiency gas or electric tankless models. This process does require retrofitting your existing water lines, and in the case of gas, ensuring proper venting and gas line sizing, but the long-term energy savings and infinite hot water are well worth the upgrade.

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Why is my tankless water heater flashing an error code?

Error codes are your tankless system’s way of communicating that a safety sensor has been triggered or a component needs attention. Common error codes indicate ignition failure (often a dirty flame rod or a gas supply issue), restricted airflow (a blocked exhaust or intake vent), or severe scale buildup. Because specific codes vary between major brands like Rinnai, Navien, and Noritz, we recommend jotting down the exact code and calling our technicians. We can translate the code and safely resolve the underlying issue.

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What does it mean when my tankless water heater says it needs to be descaled?

Many modern tankless systems have built-in flow monitors that track your water usage and alert you when mineral deposits (scale) have built up inside the heat exchanger. "Descaling" is the process of pumping a specialized, food-grade acidic solution through the unit for about an hour to dissolve this buildup. Ignoring a descale alert will eventually lead to restricted water flow, lukewarm water, and permanent damage to the unit.

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How often do tankless water heaters need to be serviced or descaled?

In the Upstate SC area, we highly recommend having your tankless water heater flushed and serviced once a year. If your home relies on well water or has particularly hard water and no water softener, you may need to have it descaled every six to nine months to keep the unit running efficiently and to keep your manufacturer’s warranty valid.

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What happens if I never flush or maintain my tankless water heater?

Skipping routine maintenance allows calcium and mineral scale to bake onto the walls of the internal heat exchanger. This forces the unit to burn much more gas or electricity to heat the water through that layer of rock-like scale, skyrocketing your utility bills. Eventually, this trapped heat will cause the heat exchanger to overheat, warp, and crack. A cracked heat exchanger often means the entire unit must be replaced, and manufacturers explicitly void warranties if the damage was caused by a lack of descaling.

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Do I still need to maintain my tankless water heater if I have a water softener?

Yes. While a whole-home water softener greatly reduces the amount of hard scale buildup in the heat exchanger, your tankless unit still requires annual preventative maintenance. During a routine tune-up, we do much more than just flush the system; we also clean the cold water inlet filter, clear the air intake screen, inspect the ignition system, and clean the flame sensor rod so your heater fires up reliably every time you turn on the tap.

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Why does my tankless water heater go cold in the middle of a shower?

If your water goes completely cold while running continuously, it usually points to a clogged inlet water filter, a failing flow sensor, or heavy scale buildup that is forcing the unit’s safety switches to shut the burner down to prevent overheating. (Note: If you briefly turn the water off and back on while shaving or washing, a brief burst of cold water is normal—this is called a "cold water sandwich" and is simply the brief moment it takes for the burner to reignite).

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Why is my tankless water heater beeping or making a loud whining noise?

If your tankless unit is whining, howling, or whistling while it runs, it is almost always an airflow or venting issue. The combustion fan is struggling to pull in enough fresh air or push out the exhaust gases, often due to a partially blocked vent pipe, a dirty fan, or a clogged intake screen. Beeping is typically accompanied by a flashing error code on the digital display, alerting you that the system requires professional service.

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Ready to Restore Your Hot Water?

Don't settle for cold showers. Contact All Hot Water LLC today for expert service in Seneca and the surrounding areas.

• Call Us: 864-214-6712

• Email Us: jacobplyler@allhotwater.com

• Service Hours: Monday-Friday 8am - 4:30pm

• After-hours/Weekend/Emergency- Leave voicemail or email and we will reply asap. Emergency work accepted based on technician availability.