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High water pressure is to plumbing what high blood pressure is to the body. It may not have immediate negative consequences. But, over time, the excess pressure can reduce the life expectancy of everything in your plumbing system. That’s where a water heater expansion tank can help. It’s a safeguard.

Safeguarding Your Plumbing

Water expands when heated. This process is called thermal expansion. Let’s say you have a fifty-gallons of cold water. As the water heats, it expands to about two percent more. If the extra volume has nowhere to go, it can put a strain on your plumbing system, pushing on the walls creating a dangerous situation.

What is a Water Heater Expansion Tank?

A water heater expansion tank is an additional small tank that’s attached to the water heater unit. It’s designed to handle the excess buildup water. When the pressure gets too high in the main tank, it will flow into the expansion tank instead. It helps to protect your plumbing from a burst line and immeasurable damage and cost.

If you have a closed-loop system, thermal expansion will lead to significant pressure increased in your plumbing system. Many cities require an expansion tank for closed-loop systems. Your manufacturer may also even void a warranty if you fail to get this safeguard for a closed system.

Tankless water heaters systems DO NOT need a water heater expansion tank since there’s no tank and no buildup of pressure.

What Size Do I Need?

Two factors impact the size of the expansion tank required.

  1. The size of your water heater.
  2. Water pressure for your system.

Each expansion tank manufacture has a calculator or chart to help you determine the recommended size and model you’ll need. There’s no universal approach, so you may have to do some research or contact a licensed plumber to help you figure it out.

Do I Need a Water Heater Expansion Tank?

If you have a traditional storage water heater, most likely you do. If you’re unsure if it’s right for your commercial water heater, contact a plumbing expert. It’s one of those things you want to make sure you have right.

Do you need a new commercial water heater at great prices? Wallingford Sales has the best prices and fast shipping. Please let us know how we can help. 866.977.2537

Shop our online catalog today.