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October 6, 2025
A tankless water heater would be an intelligent choice in most houses. It provides on demand hot water, it is space saving, and it reduces the use of energy. But, it needs to be maintained in order to work best. Flushing and cleaning it is one of the most essential activities. Otherwise, mineral deposition may lower its performance and decrease its service life.
This manual will take you through it step by step. You will understand the importance of doing it, the frequency and the most convenient means of maintaining your system in an exemplary state.
Hard water is a prevalent problem in most houses. As time goes by, the minerals such as calcium and magnesium accumulate within your heater. This accumulation, which is referred to as scale, blocks the pipes and lowers the heating efficiency.
When you do not flush on time, you might find:
These problems are avoided by flushing. Frequent cleaning recovers the efficiency, secures the system and increases its life.
The answer depends on your water quality. In places where there is hard water, it is best to flush once a year. The softer water can permit you to wait for two years. Nevertheless, it is a harmless tradition to flush every year.
Check the manual of your heater always, some manufacturers have particular recommendations. It also won’t hurt to keep your warranty active by following their advice.
Preparation Before beginning to work, collect the following:
Having these tools will make the process smooth and efficient.
The process can be broken down here as follows:
To start with, switch off the electricity to your tankless water heater. When it is electric, kill the breaker. Otherwise, shut off the gas valve in case it is gas. Safety always comes first.
Switch off the cold water switch-in and the hot water switch-out. This makes the unit isolated and thus can be cleaned without leakages.
Connect a garden hose to the cold water service port and a second one to the hot water service port. Put the two ends of the hose in your five-gallon bucket.
Add four gallons of white vinegar. Vinegar is safe, effective and it does not contain harmful chemicals.
Put the submersible pump in the bucket. Stick it in such that it pumps vinegar through the heater. Allow it to operate 45 minutes or an hour. This activity disintegrates mineral deposits within the unit.
Drain vinegar after the circulation. Once more add the pump back into the bucket and run it for 10 minutes with clean water. This rinses out all the vinegar and free chunks of debris.
Switch the pump off and take out the hoses. Shut the service vents and open the water valves. Last but not the least, turn on power or gas to your heater.
Your system is now clean and ready for use.
Routine maintenance saves you the expenses of expensive fixes and will make sure your heater performs efficiently.
Self-flushing works for many homeowners, yet there are cases when you require the services of an expert. Contact a specialist in case of noticing:
Professional service is time saving and damage aversion at this point.
That is where Magnificent Plumbing & Rooter can serve. Our team of experts understands tankless water heaters thoroughly. We use the right tools and professional practices to maintain your system safely. So, if you need regular flushing or a full service, we take care of your heater to operate all year round.
Flushing your tankless water heater is not complicated, but it is essential. Frequent cleaning will ensure that water is running well, reduce energy consumption and increase the life of your system. It can be done with basic equipment, and a bit of time. Nevertheless, professionals are usually right in times of uncertainty.
Do not allow the minerals to accumulate to cause problems. Take action now. At (925) 478-8073, call Magnificent Plumbing & Rooter to have professional tankless water heater flushing and cleaning. Our professional and amiable technicians are willing to maintain your hot water system in good condition.