An air chamber is a vertical, air-filled pipe or spring coil installed in plumbing systems to absorb sudden changes in water pressure, which can help prevent the phenomenon known as “water hammer.” Water hammer occurs when a valve or faucet is abruptly closed, causing water to slam against the walls of the pipe. The air chamber acts as a cushion, compressing to absorb the shock and minimize noise and vibration. Air chambers are typically located near faucets, washing machines, or dishwashers, where rapid valve closures are common. Over time, the air in these chambers can be absorbed into the water, reducing their effectiveness, which may require draining the system to restore the air cushion. Modern plumbing systems often use water hammer arrestors, which are sealed units that prevent the loss of air over time.
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