Tankless water heaters have gained popularity in recent years due to their energy efficiency, endless hot water supply, and space-saving design. Unlike traditional tank water heaters, which store and continuously heat water, tankless models provide hot water on demand, ensuring you never run out. However, to maintain optimal performance and longevity, regular annual maintenance is essential.

At Larratt Bros Plumbing, we’ve been proudly serving the Bay Area since 1990, offering expert plumbing repairs and water heater services. With over 30 years of experience, we understand that proper care is crucial to keeping your tankless water heater running efficiently year after year.

In this article, we’ll explore why annual maintenance is necessary for tankless water heaters, answer common questions, and share tips on how you can keep your system in top shape. Whether you need water heater repair & installation, leak detection, or simply advice on maintenance, we’ve got you covered.

Do Tankless Water Heaters Require Annual Maintenance?

Yes, tankless water heaters do require annual maintenance to ensure they continue to operate efficiently and effectively. While these systems are designed to last longer and operate more efficiently than traditional tank water heaters, regular care is necessary to maintain their performance and prevent costly repairs.

Without proper maintenance, mineral buildup, clogged filters, and other issues can arise, affecting the unit’s ability to provide on-demand hot water. Annual maintenance tasks typically include:

• Flushing the system: Over time, minerals like calcium and lime can accumulate inside the water heater, particularly in areas with hard water. Flushing the system removes these mineral deposits, helping to avoid potential clogs in your drains, sewers, and plumbing fixtures like faucets and sinks.
  
• Cleaning filters: Your tankless water heater may have filters that need to be cleaned periodically to ensure proper water flow. Clogged filters can lead to poor performance and even damage the system.
  
• Inspecting for leaks and damage: It’s essential to check the unit for any signs of wear or potential leaks that could cause damage to the unit or surrounding plumbing systems like bathtubs, showers, and toilet repair & installation.
  
• Checking the venting system: Proper ventilation is critical for the safe operation of a tankless water heater. Ensuring that vents are clear of obstructions will help prevent damage to the unit and your home’s plumbing.
  

By committing to annual maintenance, you can extend the lifespan of your tankless water heater and avoid expensive water heater repair & installation down the road. Regular servicing also ensures that your home’s water systems, such as sinks, showers, and drains, continue to function smoothly without interference from your water heater.

Do Tankless Water Heaters Need to Be Flushed Annually?

Yes, tankless water heaters typically need to be flushed annually, especially if you live in an area with hard water. Over time, minerals such as calcium and magnesium can build up inside the unit, forming deposits that can restrict water flow and decrease the system’s efficiency. This mineral buildup can lead to a variety of issues, including poor water flow, reduced heating capacity, and even premature failure of the unit.

Flushing your tankless water heater is a straightforward process that involves running a descaling solution through the system to dissolve and remove these mineral deposits. This not only improves the system’s performance but also extends its lifespan.

Here are some of the reasons why flushing is so important:

• Prevents clogging: Without flushing, mineral deposits can block the flow of water, which can affect your drains, faucets, sinks, showers, and even cause issues with other plumbing systems like garbage disposal installations.
  
• Improves efficiency: A flushed water heater operates more efficiently by allowing water to flow freely through the system. This means your tankless water heater will heat water faster and use less energy, saving you money on utility bills.
  
• Prolongs the life of the system: Annual flushing helps prevent the buildup of mineral deposits that can damage internal components of the heater. By keeping the unit in good condition, you can avoid the need for frequent water heater repair & installation and enjoy uninterrupted hot water.
  

Flushing is particularly critical for households that use a lot of hot water or have hard water, as these factors increase the likelihood of mineral buildup. If you haven’t already, schedule an annual flushing with Larratt Bros Plumbing to keep your tankless water heater running smoothly.

How Do You Take Care of a Tankless Water Heater?

Taking care of your tankless water heater is essential for maximizing its efficiency, preventing costly repairs, and ensuring a long service life. While annual maintenance performed by professionals like Larratt Bros Plumbing is crucial, there are also several simple tasks you can do throughout the year to keep your system in top shape.

Here are some key maintenance tips to help you take care of your tankless water heater:

1. Clean the filters regularly
   Most tankless water heaters have filters that help maintain good water flow. Over time, debris and sediment can accumulate in the filters, reducing the efficiency of your unit. Cleaning the filters regularly ensures that your faucets, sinks, showers, and other plumbing fixtures receive an adequate water supply.
   
2. Check for error codes
   Many modern tankless water heaters display error codes on the control panel to alert you of any issues. These codes can indicate a variety of problems, including overheating, gas flow issues, or electrical malfunctions. If you see an error code, it’s important to address it promptly to avoid further damage to your system and other plumbing systems like toilets or bathtubs.
   
3. Monitor the water temperature
   Set the water temperature to an optimal level, typically between 120°F and 140°F, to ensure that the system operates efficiently without putting unnecessary strain on your unit. Too high of a temperature can wear down the internal components faster and increase the risk of damage to sinks, showers, and other plumbing fixtures. If your water heater is set too low, you may experience reduced performance.
   
4. Inspect the venting system
   Proper ventilation is vital for safe and efficient operation of your tankless water heater. Check the vents periodically to ensure they are clear of obstructions, such as leaves or debris. If the venting system is compromised, it can affect the heater’s performance and potentially cause damage to your plumbing systems, including sewers and drains.
   
5. Perform leak detection
   Even small leaks in your tankless water heater can lead to major problems over time. Regularly inspect your unit and surrounding plumbing for signs of leaks. Early detection of leaks helps prevent water damage to your home’s plumbing systems, such as faucets, sinks, and toilet repair & installation.
   
6. Schedule professional maintenance
   While these tasks are helpful, professional maintenance is essential for a thorough inspection of your system. A licensed plumber can perform tasks such as flushing the unit, inspecting internal components, and checking for any underlying issues that may not be immediately obvious.
   

By staying on top of these routine maintenance tasks, you can help prevent issues with your tankless water heater and reduce the likelihood of needing expensive repairs in the future. If you’re unsure about how to care for your water heater, don’t hesitate to contact Larratt Bros Plumbing for expert assistance.

What is the Service Life of a Tankless Water Heater?

The service life of a tankless water heater typically ranges from 15 to 20 years when properly maintained. This is significantly longer than traditional tank water heaters, which usually last between 10 to 15 years. The extended lifespan of a tankless water heater makes it a worthwhile investment for homeowners who want both efficiency and long-term reliability.

Several factors can influence the service life of a tankless water heater, including:

1. Water Quality
   The quality of your water plays a crucial role in the longevity of your unit. Hard water, which contains higher levels of minerals like calcium and magnesium, can lead to scale buildup inside the water heater. This mineral deposit can reduce efficiency and damage internal components. In areas with hard water, regular flushing and annual maintenance are even more critical to prevent this buildup and ensure a long service life.
   
2. Regular Maintenance
   Routine maintenance, such as flushing the system, cleaning filters, and checking for leaks, helps keep the water heater operating efficiently. The more consistently you maintain your tankless water heater, the less likely it is to experience issues that could shorten its lifespan. Scheduling regular maintenance with a professional plumber, like Larratt Bros Plumbing, can identify minor problems before they escalate into costly repairs.
   
3. Usage
   The frequency and demand for hot water in your home also impact the lifespan of your tankless water heater. If your household has high water usage—whether due to multiple showers, large bathtubs, or simultaneous use of faucets—the water heater may experience more wear and tear. However, tankless water heaters are generally more durable than traditional models, as they don’t deal with the same constant strain of holding heated water.
   
4. Proper Installation
   Proper installation is essential to ensure your tankless water heater operates at peak performance throughout its life. A poorly installed unit can cause issues like improper ventilation, water leaks, or pressure imbalances, which can reduce its efficiency and shorten its service life. Working with a trusted plumber for water heater repair & installation will ensure your system is installed and maintained correctly from the start.
   

By following proper care and scheduling regular maintenance, a tankless water heater can provide reliable service for 15 to 20 years, far outlasting traditional models. Regular attention to water quality and usage can also help maximize the heater’s efficiency and save you money in the long run by avoiding costly plumbing repairs and premature replacements.

What is the Expected Service Life of a Water Heater?

The expected service life of a traditional water heater varies depending on the type of unit, but on average, most tank water heaters last between 10 to 15 years. In comparison, tankless water heaters have a longer lifespan, typically ranging from 15 to 20 years. This difference in longevity is one of the reasons many homeowners are opting for tankless water heaters, as they tend to offer better long-term value and fewer replacement costs.

However, just like tankless water heaters, the service life of a traditional tank water heater can be affected by several factors:

1. Water Quality
   Just as with tankless water heaters, the quality of the water used can significantly impact the lifespan of a traditional water heater. Hard water, which is rich in minerals like calcium and magnesium, can lead to sediment buildup inside the tank. This sediment can create hot spots that damage the unit and reduce its efficiency. Regular maintenance, including flushes and inspections, can help remove these deposits and extend the life of your unit.
   
2. Usage and Demand
   If your household regularly uses a large amount of hot water—such as multiple showers, frequent bathtub use, or running several faucets at once—your water heater may wear out more quickly. The increased demand for hot water places extra strain on the system, which can reduce its lifespan. A tankless water heater, on the other hand, only heats water when needed, so it tends to experience less wear and tear.
   
3. Maintenance and Care
   Annual maintenance is just as important for traditional tank water heaters as it is for tankless systems. Regularly inspecting your unit, cleaning the filters, checking for leaks, and flushing the tank to remove sediment buildup can prevent major issues and ensure your unit lasts as long as possible. Without proper maintenance, water heater repair & installation will likely be needed sooner than expected.
   
4. Installation and Quality
   The installation of your water heater plays a key role in its expected lifespan. Improper installation can cause problems such as leaks, pressure issues, or poor venting, all of which can lead to a shorter life for your water heater. It’s crucial to work with a professional plumbing company, such as Larratt Bros Plumbing, to ensure your water heater is properly installed and maintained.
   

While tankless water heaters generally offer longer service lives, traditional tank water heaters are still reliable options for many households. Ensuring your system is regularly maintained, properly installed, and appropriately sized for your needs can help maximize its lifespan, and avoid the need for early water heater repair & installation.

How Often Should a Tankless Water Heater Be Replaced?

While tankless water heaters are known for their longevity, they don’t last forever. As with any appliance, there comes a time when replacement is necessary. On average, a well-maintained tankless water heater can last anywhere from 15 to 20 years, but there are several indicators that it may be time to replace your unit before it breaks down entirely.

Here are some common signs that your tankless water heater may need to be replaced:

1. Increased Repair Frequency
   If your tankless water heater has started requiring frequent repairs, it may be a sign that the internal components are wearing out. Common repairs might include issues with the heat exchanger, thermostat, or gas control valve. If you find that you’re regularly calling for water heater repair & installation, it might be more cost-effective to replace the unit rather than continue to repair it.
   
2. Inconsistent Water Temperature
   A sudden decrease in water temperature or difficulty maintaining a consistent hot water supply can indicate that the heating elements in the unit are malfunctioning. If this issue persists despite repairs, it may be time to consider replacing the unit. An inconsistent water supply can affect your daily routine, especially when you rely on showers, bathtubs, or sinks for comfort.
   
3. Increased Energy Bills
   One of the key benefits of a tankless water heater is its energy efficiency. If your energy bills have risen significantly and the system is not performing as efficiently as it once did, it may be time to replace the unit. Over time, a deteriorating unit becomes less energy-efficient, which can lead to higher utility costs. A new tankless water heater could help restore your home’s energy efficiency.
   
4. Unit Is Near the End of Its Lifespan
   If your tankless water heater is approaching the 15–20-year mark, it may be time to consider replacement. While some units can last longer with proper maintenance, they may start to experience diminished efficiency and performance as they age. Replacing your water heater before it completely fails can help you avoid sudden breakdowns and the inconvenience of an unexpected lack of hot water.
   
5. Frequent System Error Codes
   Modern tankless water heaters often come equipped with diagnostic error codes that alert homeowners to problems with the unit. If your heater is regularly displaying error codes that are costly or difficult to fix, it may be a sign that the unit’s components are nearing the end of their life. At this point, replacing the system may be a better investment than ongoing repairs.
   
6. Poor Water Quality
   If you notice that the water quality from your tankless water heater has deteriorated—such as discoloration, sediment, or strange odors—it could indicate internal issues that may not be easily resolved. Over time, mineral buildup from hard water can damage the unit’s internal components. In these cases, it might be more cost-effective to replace the unit rather than attempt multiple flushes or repairs.
   

While tankless water heaters are known for their durability, replacing the unit when these signs arise can save you money in the long run. Larratt Bros Plumbing offers professional water heater repair & installation services to help assess whether replacement is necessary and ensure you choose the best system for your needs.

Keep Your Tankless Water Heater in Top Shape with Professional Maintenance

Proper care and annual maintenance are essential to ensure your tankless water heater operates efficiently and lasts for years. From flushing the system to cleaning filters, regularly servicing your unit can help prevent common issues like mineral buildup, decreased efficiency, and early wear and tear. By staying proactive with maintenance, you can avoid the hassle and expense of premature water heater repair & installation.

If your tankless water heater is approaching the end of its service life or you’ve noticed any warning signs like inconsistent water temperature or increased energy bills, it may be time to consider a replacement. A new, energy-efficient model can restore the comfort and convenience you expect from your hot water system while saving you money on utility bills.

At Larratt Bros Plumbing, we’ve been serving the Bay Area for over 30 years, providing expert plumbing repairs, water heater repair & installation, and maintenance services. Our team of professionals is dedicated to keeping your home’s plumbing systems, including faucets, showers, sinks, and bathtubs, running smoothly.

If you haven’t already scheduled your tankless water heater maintenance for the year, don’t wait! Contact Larratt Bros Plumbing today to ensure your system stays in optimal condition. Our experts can help with everything from leak detection to water treatment & purification, ensuring your plumbing system is in excellent shape.

Call us now at (650)873-5794 to schedule your annual maintenance, or for any questions about tankless water heater replacement!