Expansion Tank

Find out if your water heater requires an expansion tank and how they work. Receive expert installation from Legacy Plumbing in Frisco, Plano and DFW.

What is an expansion tank and do I need one? Why is it required in some cities of DFW? Why hire a plumber for expansion tank installation? Many of our customers have questions on this small appliance, find answers and learn why Legacy Plumbing is the best option.

What Is an Expansion Tank?

When water heats up, it expands. If your system has a closed-loop system, that expansion has nowhere to go. It just spikes the pressure in the system. A water heater expansion tank (also called a thermal expansion tank) relieves that pressure on your lines, fixtures, and even appliances. The expansion tank looks like a small propane tank installed above your water heater and is filled with water and compressed air. As heated water expands, the air further compresses and the excess water occupies that space. Learn more about how an expansion tank works in this blog article.
Closed-loop systems require expansion tanks, so check to see if your home has this type of system. Check valves or pressure regulating valves installed on water lines in such systems trap the additional water pressure caused by heat expansion inside your home. This stresses your system, which is why 2018 plumbing code requires water heater expansion tanks on all closed-loop systems.

Thermal Expansion Tank Requirements in North Dallas​

City-specific requirements are subject to change at any time. We recommend referring to the authority having jurisdiction for the latest information on when an expansion tank is required in your area.

While expansion tanks are typically only required on closed-loop systems, some cities require them on every new water heater installation. At Legacy Plumbing, we stay in contact with the cities’ building inspection departments and make sure that everything is done up to their standards so that the inspection process goes smoothly.

Not All Expansion Tanks Are Equal​

There are many different manufacturers that make expansion tanks, and there is a great variance in the quality of the materials and the manufacturing processes. There are also a lot of different ways to go about installing an expansion tank on the system. Because expansion tanks are often installed inside homes in or in the attic with the water heater, the risk of water damage if they fail is very high.

At Legacy, we are committed to using the best quality materials and installation practices in order to protect your home. We only use high-quality stainless steel parts and have chosen an expansion tank manufacturer that stands behind its product. We have also refined our standard for installing these tanks so that you can count on it being done right every time.

Expansion Tank Installation

To avoid excessive pressure in your home’s plumbing system, a thermal expansion tank attached to the hot water heater allows the water within the system to expand and release excess pressure internally. How does that help you? The relief in pressure can help save your system from costly plumbing repairs down the line.

But here’s the kicker about a water heater expansion tank; you can’t install one yourself. This is not a DIY plumbing job. When it comes to an expansion tank for your water heater, hire the professionals at Legacy Plumbing for top-rated expansion tank installation.

Legacy’s expansion tank service is…​

Don’t settle for just any plumber. Get expert expansion tank service with Legacy.

Legacy Plumbing is centrally located to provide fast service to North Dallas and surrounding suburbs. If you are looking for a North Dallas area plumber please call us today or complete our Online Request Form.

Our Work is Our Word.

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