05/22/2025
Did you know that some areas have made expansion tanks on water heaters code? Here is what they are and what the purpose of them are. Check with your municipality to see if you are up to code.
An expansion tank is a component in a water heater system that helps manage pressure caused by the expansion of water as it's heated. It acts as a buffer, providing a place for the expanded water to go, preventing excessive pressure buildup in the system. This helps protect plumbing, fixtures, and the water heater itself from damage.
Here's a more detailed explanation:
How it works:
Expansion tanks typically have a rubber bladder or diaphragm that separates the air space from the water. When water is heated and expands, it enters the tank, compressing the air or bladder. When the water cools, the air or bladder expands, pushing the water back into the system.
Why it's important:
Without an expansion tank, the expanding water would have nowhere to go, leading to increased pressure within the closed plumbing system. This can cause water hammer, leaks, burst pipes, and damage to the water heater and other plumbing components.
Benefits:
Expansion tanks protect against pressure build-up, reduce noise from water hammer, improve system efficiency, and can even help prevent scaling and corrosion inside the water heater.
Types:
There are different types of expansion tanks, including bladder tanks and compression tanks, each with its own advantages and disadvantages.
