Top Tips To Protect Your Outdoor Tankless Water Heater During Winter Months

A tankless water heater can function well despite the weather outside. It is known to function well even during harsh winter months, but sometimes it might face some problems. Tankless water heaters basically use a condenser mechanism which helps to warm the water beforehand, so that when you decide to use the water heater, it does not take too long for the water to reach the temperature you desire.

This way, by heating the water beforehand, your tankless water heaters are able to heat about 2 gallons of water per minute to the temperature suitable for usage. When you get your tankless water heaters, they function under lower pressure conditions. However as time goes on and as winter comes, more water has to be heated up to a higher temperature and pressure problems start to arise to work your tankless water heaters more.

Usually, the water and the mechanism inside a tankless water heater is not affected by the external environment’s temperature. However, if you do not take care of your tankless water heaters during harsh weather conditions like during winter season, the water and the system inside your tankless water heater might all freeze up.


How your tankless water heaters work

Your tankless water heaters come in both indoor and outdoor versions. Both of these versions of the tankless water heaters have a built-in feature of freeze protection. This means that the water inside the tankless water heaters is protected from getting frozen especially against a particular temperature range which is usually targeted at the coldest winter days. Usually this temperature range is from about -22 degrees Celsius to -30 degrees Celsius. But the problem is that, if your tankless water heaters are exposed to such extreme temperatures for a prolonged period of time, this anti-freeze mechanism may not work anymore.

Winterize your water heater

Winterizing your tankless water heater is a method used to ensure that it doesn’t freeze up during the winter months. In order to carry out this process, first of all, ensure that you have turned off the unit and have stopped the electrical supply. Make sure to also unplug the unit from its power source so that you are sure that the electricity is not flowing through anymore.

Next, you would need to cut the water supply to your tankless water heater. Go ahead and drain all the water remaining in your tankless water heater. After this, start reducing the water pressure going into your tankless water heater and slowly remove the water pipes which are connected to the water heater. Get a plastic cover and seal the vent termination as well as the exhaust exit, so that we can keep any debris out.

After this, we would need to change the vent system of your tankless water heater system to winterize it. This is called a concentric or also known as a dual ventilation system for your tankless water heaters.

Dual vent system for tankless water heaters

Setting up a dual vent system for your tankless water heaters at this point would aid the anti-freezing aim. All you have to do is to ensure that you set up the drain pipes in the places where they are not subjected to freezing, like on the inside surface of a wall. Make sure you allow enough air to burn for the appliances powered by gas so that you prevent any negative effects from freezing the water in a system without a tank. Alternatively, you could also use something called the back-draft reducer to seal off the back-draft flap. After this is done, you should be allowing a lean line of water to run through all the time so that the water in the heater does not ever freeze up.

Benefits of all these procedures

All the methods and procedures we had listed above are entirely to fulfill one aim – to prevent the water in your tankless water heaters from freezing up during extreme temperatures such as during winter. These methods would give security and protection to your tankless water heaters throughout the few months during winter and the prolonged low temperatures, preventing the water from chilling up. These methods would not be necessary if you are just expecting a few cold days, for example, over autumn. However, when you do expect a prolonged period of low temperatures, we suggest you carry these tips out.

If you have any doubts or will like to get professional help from a Chandler plumber in winterizing your water heater, feel free to ring us up at Diamond Back Plumbing. We are always ready to help you with your plumbing issues and we understand how frustrating such issues can get, especially for a first time homeowner. We are experienced in all plumbing issues and we charge affordable rates so that we are able to build a long term relationship with our customers. Try us to see the difference!