Can Air in Pipes Stop Water Flow?

Yes, air trapped in pipes can impede water flow. This can result in noticeably lower water pressure.

How Air Affects Water Flow in Pipes

Air in pipes doesn't completely stop water flow in most cases, but it significantly reduces it. Here’s a breakdown of how:

Reduced Pressure: As mentioned in the reference, "Trapped air can impede the flow of water, resulting in lower water pressure." When air occupies space in the pipes, it physically restricts the area available for water to flow through.
Air Compression: Unlike water, air is compressible. When water tries to flow past a pocket of air, the air compresses, creating resistance. This further slows down the water flow.
Air Lock: In some instances, a large enough air pocket can form what is known as an "air lock," which significantly restricts or completely stops water flow. This air lock acts like a barrier that the water cannot easily push past.

The following symptoms may indicate air trapped in your pipes:

Low Water Pressure: One of the most common signs. You may notice weaker flow from faucets and showerheads.
Sputtering Faucets: When you first turn on a tap, you may experience sputtering or spitting of water before a steady flow emerges. This is due to the air escaping the pipes.
Gurgling Noises: Strange gurgling or bubbling sounds from your pipes can indicate the presence of air.
Inconsistent Water Flow: You may notice your water pressure fluctuating or the flow starting and stopping intermittently.

Here are some methods to remove trapped air from your plumbing system:

Run all fixtures: Turn on all faucets, showers, and other water fixtures in the house, starting with the lowest and moving to the highest. This can help push the air out of the system.
Flush Toilets: Flush all toilets to help move any air pockets in those pipes as well.
Check for Leaks: Leaks in your plumbing system can draw air into the pipes. Inspect for any leaks and repair them.
Call a Plumber: If these solutions don't solve the issue, it's best to call a licensed plumber who can professionally diagnose and resolve any underlying issues.

By understanding how air affects water flow, you can better address issues in your home’s plumbing.