If your faucet is coughing, spitting, or making that weird “pffft” sound like it’s annoyed at you, chances are you’ve got air trapped in your water lines.
It’s super common.
It usually shows up after a water shutoff, plumbing work, or even a brief outage.
The good news is that this is one of those home issues that’s pretty easy to fix. You don’t need special tools. You don’t need to be a plumbing wizard. You just need a little patience and the right order of steps.
In this post, we’ll show you how to get air out of water lines like a PRO.
Step 1: Turn Off Appliances That Use Water
Before you touch a single faucet, pause and take care of this part first.
Appliances love to pull in air when water pressure is unstable, and that can make things louder, messier, and more annoying than needed.
Go around the house and shut off or pause anything that uses water. That usually includes stuff like the:
- Dishwasher
- Washing machine
- Ice maker
- Fridge water dispenser
You don’t need to unplug anything. Just make sure they’re not actively drawing water while you’re clearing the lines.
This step keeps air from getting sucked into tiny supply lines while you’re working.
It also helps you focus on one thing at a time instead of wondering why the washing machine just started screaming mid-process.
Also Read: Water Heater Leaking From Bottom
Step 2: Open The Lowest Faucet First
This is the most important step, so don’t rush it.
Find the lowest faucet in your home. For many places, that’s a basement sink, laundry tub, or outdoor spigot. If you don’t have a basement, it’s usually the faucet closest to ground level.
Turn on the cold water slowly. Not full blast. Just a nice, steady turn.
At first, the water might sputter, hiss, or shoot out in little bursts.
That’s the air escaping. Let it do its thing.
Keep the faucet open until the flow turns smooth and consistent, with no spitting or weird noises. This can take a minute or two, or sometimes longer if there’s a lot of air trapped.
Be patient. You’re setting the foundation for everything else.
Step 3: Open The Hot Side At The Same Faucet
Once the cold water at that lowest faucet is flowing normally, switch over to the hot side.
Again, turn it on slowly and let it run. You might hear more sputtering here, especially if the hot water system was fully drained at some point.
Let the hot water flow until it runs steady and quiet.
This step helps clear air from both sides of the plumbing system. Skipping it can leave air hanging out in the hot lines, waiting to surprise you later during a shower.
When both hot and cold are flowing smoothly, turn the faucet off and move on.
Also Read: Drain In Bathtub Won’t Drain
Step 4: Move To The Next Lowest Faucet
Now you’re going to repeat the process, working your way upward through the house.
Picture the air being gently pushed higher and higher until it finally escapes.
Go to the next lowest faucet and follow the same routine. Cold water first, let it run until smooth. Then hot water, let it run until smooth. Close the faucet and move on.
Take your time here. Rushing through can cause air to bounce around inside the pipes instead of actually leaving the system.
Slow and steady really does win in this case.
By the time you reach the top floor, most of the trapped air should be gone or close to it.
Step 5: Run Showers And Tubs
Faucets are great, but showers and tubs move a lot more water, which helps knock out stubborn air pockets.
Turn on each shower and tub in the house, one at a time.
Let the water run for a minute or two.
If a showerhead sputters badly, you can unscrew it and run the water straight from the pipe for a bit. It’s louder, but very effective.
Once the flow is smooth, screw the showerhead back on and give it a quick test. You should hear a steady stream, not that stop-start chaos from before.
This step also helps clear air that likes to hide in vertical sections of pipe.
Step 6: Flush All Toilets
Toilets move water fast, and that sudden rush can help clear out any air still hanging around.
Go through the house and flush each toilet once or twice.
Pay attention to the sound while the tank refills. If it sounds calmer and more consistent than before, you’re on the right track.
This step also helps rebalance pressure throughout the system, which makes everything else behave better afterward.
Also Read: No Water Pressure In Shower
Step 7: Turn Appliances Back On
Now it’s time to bring everything back online.
Turn your appliances on one by one.
Let the dishwasher run a short cycle. Start the washing machine and let it fill for a minute.
Use the fridge water dispenser for a bit if you have one.
Doing this after clearing the main lines keeps air from getting trapped in those smaller supply hoses. If an appliance makes a brief sputtering noise at first, that’s normal. It should settle quickly.
If it doesn’t, pause the appliance and give the nearest faucet another quick run.
Step 8: Let The System Rest, Then Recheck
Here’s the part people skip, and it’s surprisingly helpful.
Let the whole system sit for about 10 to 15 minutes. Don’t run any water during this time.
This gives tiny air bubbles a chance to rise and gather instead of staying scattered throughout the pipes. After the break, turn on a couple of faucets again.
Check both hot and cold.
If everything runs smoothly and quietly, you’re done.
If there’s still a little sputtering, repeat the faucet process once more. Most of the time, that clears the last bit.
When To Call A Plumber
Sometimes, air in the lines isn’t just leftover from a shutoff. If the problem keeps coming back, something else could be letting air into the system.
Here are a few signs it’s time to bring in a pro:
- Sputtering returns every day or after long periods of no water use
- You hear banging or knocking sounds that don’t improve
- Water pressure stays low even after clearing the lines
- You notice leaks, damp spots, or unexplained water damage
A plumber can check for loose fittings, hidden leaks, or pressure issues that aren’t obvious from the outside.
Catching these early can save you from much bigger headaches later.
Bottom Line
Getting air out of water lines sounds intimidating, but it’s really easy. Start low, move up, take your time, and let the system breathe a little along the way.
Most homes clear out trapped air in under half an hour, and once it’s gone, everything feels calmer. Quieter faucets. Smoother showers. No more surprises splashing at the sink.
And honestly, there’s something oddly satisfying about fixing it yourself, then turning on a faucet and hearing… nothing.
If you are looking for a Big Bear plumbing, heating & air conditioning contractor, please call (909) 584-4376 or complete our online request form.
Category: Plumbing
