We often take for granted the convenience of modern plumbing systems. We simply turn on the faucet or step into a shower and expect to feel hot water almost instantaneously. But behind the scenes, various parts and components of our hot water system are busy at work in delivering hot water to our taps when we need them. And to ensure the longevity and efficiency of your water heater, there’s an essential component you might not be familiar with – the water heater expansion tank.
Read on as we explore what an expansion tank does, why it’s important, and how to recognize when it needs replacement.
What is a Water Heater Expansion Tank?
A water heater expansion tank is a small tank installed near your water heater that contains a bladder or diaphragm that separates air from the water. When water is heated, it expands, and the increased volume needs somewhere to go. The expansion tank provides a space for this extra volume, preventing excessive pressure buildup in the plumbing system.
Why is an Expansion Tank Important?
- Pressure Regulation: As water heats up and expands, it increases the pressure within the plumbing system. Without an expansion tank, this pressure can cause damage to pipes, fixtures, and the water heater itself. The expansion tank absorbs this excess pressure, maintaining a safe level throughout the system.
- Preventing Water Hammer: Water hammer is a loud banging noise that occurs when the pressure in the pipes suddenly changes. This can be caused by the rapid expansion and contraction of water in the system. An expansion tank helps to mitigate this issue by providing a cushion for the expanding water.
- Prolonging Water Heater Life: Excessive pressure can shorten the lifespan of your water heater by causing wear and tear on its components. By regulating pressure, an expansion tank helps to protect the water heater and extend its operational life.
How to Know When an Expansion Tank Needs to be Replaced
- If you notice water leaking from the expansion tank, it’s a clear sign that the tank is compromised and needs to be replaced.
- The air charge inside the expansion tank is crucial for its operation. If the tank loses its air charge, it won’t be able to absorb the expanding water. You can check this by tapping the tank; a hollow sound indicates an intact air charge, while a dull sound suggests it might be full of water and not functioning properly.
- Frequent fluctuations in water pressure or water hammer noises might indicate that the expansion tank is not working correctly.
- Most expansion tanks last between 5 to 10 years. If your tank is within this age range or older, it’s a good idea to have it inspected by a professional and consider replacing it if necessary.
When to Call a Professional
If you suspect your expansion tank is not functioning properly or you notice any of the signs mentioned above, contact Eagle Service Company right away. One of our highly skilled plumbing experts can accurately diagnose the issue, check the pressure settings, and replace the tank if needed. Contact us today or anytime for all your water heater needs.
