Tankless Water Heaters and Hard Water

If you are experiencing problems with hard water and your tankless water heater, you may want to consider installing an isolation valve on the tankless unit. This will prevent scaling and deliming, and it is easy to install without the need for a plumber. You should also consider adding a water softener. It is also necessary to keep the water temperature in the tankless unit below 120degF to avoid scaling.

Limescale build-up

Limescale build-up in tankless heaters is caused by sediments in water, which do not dissolve and settle to the bottom of the water heater. The sediments can come from a variety of sources, including municipal water and well water. The sediments can cause various problems and can even cause the failure of certain appliances.

Luckily, removing limescale from water heaters is simple and safe. This preventative maintenance will protect your appliance from damage, and you’ll also be protecting other water-using appliances. Limescale is made up of deposits of calcium and magnesium, which adhere to the metal parts of a system. This type of build-up is common in a number of household appliances, including water heaters.


If you’re looking for a way to protect your tankless water heater from hard water, there are many options available to you. One inexpensive option is a scale inhibitor system, which allows water to pass through a filter before entering the water heater. These systems usually feature shut off valves, which make filter changes easy. They reduce the buildup of limescale and prevent minerals from binding to metal surfaces.

Hard water is an issue that affects almost every appliance that uses water. Minerals from hard water settle around heating elements and reduce their efficiency. Over time, this can reduce the capacity of your water heater.

Vinegar flush

If you live in an area where the water supply is made up of a lot of minerals, you may need to perform a vinegar flush for tankless water heaters. Hard water will make the system more prone to scale and need routine maintenance. Although water softeners can help, you will still need to flush your system from time to time, especially if you have very hard water. For more information about vinegar flush for tankless water heaters and hard-water problems, watch the video below.

You can also purchase a system flush kit that includes the tools and materials needed to perform the flush. This kit will come with a pump and hoses, and will include all the necessary equipment to flush your tankless water heater. Plumber near you

Annual service

Annual service for tankless water heaters and other hard water-related problems is essential to keep your system in good working order. Hard water deposits can negatively impact your heater’s heat exchanger, which is the part that heats water. A dirty heat exchanger prevents the burners from doing their job and can cause the tankless water heater to break down. If your water is particularly hard, a tankless water heater should be serviced every six to nine months.

It is important to follow the manufacturer’s instructions for your tankless water heater’s maintenance and repair. If you’re not familiar with the specifics of your tankless water heater, check the manufacturer’s manual or contact the manufacturer for assistance. Depending on your model, you may need a sump pump or hoses to discharge and flush water out of your system. If you don’t have these tools, you should contact a plumber to check the system. A plumber can explain the proper procedures and frequency for maintenance.

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