What Does an Expansion Tank Do?
When water heats up, it expands. In some plumbing systems, that expansion can increase pressure.
An expansion tank gives that extra pressure somewhere to go, which can help protect the water heater and plumbing system.
A water heater expansion tank is a small tank connected near the water heater. Its job is to help manage pressure changes that can happen when water heats and expands.
Not every homeowner knows whether they have one, but expansion tanks can be an important part of the plumbing system.
Possible signs include:
• Water heater pressure concerns
• Dripping from the temperature and pressure relief valve
• Water pressure issues
• Expansion tank is leaking
• Expansion tank is rusted or corroded
• Tank feels loose or unsupported
• Water heater replacement questions
• Recent PRV or pressure changes
Expansion tanks are often installed near or above the water heater, usually on the cold water side. They are commonly smaller than the water heater and may look like a small metal tank.
What to Send Us
If you are asking about an expansion tank, send:
• A photo of the full water heater
• A photo of the expansion tank
• A photo of the pipe connections
• A photo of any leak, rust, or corrosion
• A photo of the water heater label
Call a plumber if your expansion tank is leaking, rusted, loose, unsupported, or if you are having pressure concerns around your water heater.
Call or text 470-531-3956 with a photo or short video.
Shanks is on it.
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