Faucets that sputter and spit, pipes that bang when you open a tap, an irregular “machine-gun” stutter of water — that’s air in your water lines. Usually it’s harmless and you can clear it yourself in about ten minutes. Sometimes it’s the first symptom of a real problem. Here’s how to tell the difference.
How Air Gets Into Water Pipes
- Recent plumbing work or a utility shutoff. Any time the system is drained — by you, a plumber, or the water district flushing mains — air fills the empty pipe and gets trapped at high points.
- The water heater. If only your hot taps sputter, the air is coming from the tank: sediment buildup causes over-heating pockets that create gas, and a decomposing anode rod can generate hydrogen sulfide (that rotten-egg smell is the giveaway).
- A well system. On well properties — common around Ojai and the county’s rural edges — a failing check valve, waterlogged pressure tank, or a drawn-down well all push air into the house.
- A leak on the suction side. Rarely, a crack or failing fitting lets pipes draw air in as pressure changes — air that keeps coming back is the clue.
How to Get Air Out of Water Lines
- Turn off the main water supply valve — usually near the hose bib at the front of the house, or at the meter box by the street.
- Open every faucet in the house about half a turn, starting with the fixture closest to the main and working to the farthest. Include tubs and showers, and flush the toilets. Open both hot and cold sides.
- Turn the main back on and let water run through every open faucet. Expect coughing and sputtering for a minute or two — that’s the air leaving.
- Once every fixture runs smooth and clear, close the faucets in reverse order, farthest first.
Run the washing machine and dishwasher briefly afterward — trapped air in appliance lines clears the same way.
If the Air Keeps Coming Back
One bleed should end it. Recurring air means the air has a source, and the pattern tells you where:
- Hot side only — the water heater needs attention: a sediment flush, or an anode rod on its way out. Start with water heater repair before the tank pays the price.
- Sputtering plus low pressure, or pinhole leak history — aging galvanized pipe corrodes from the inside, traps air, and chokes flow. That’s a repipe conversation, and air in the lines is one of its classic early signs.
- Air after every irrigation cycle or on a well system — a check-valve or pressure-tank problem that’s worth diagnosing before the pump works itself to death.
- Air plus a spike in your water bill — a hidden leak can pull air as the line depressurizes. Electronic leak detection finds it without opening walls.
Still Sputtering?
If a full bleed didn’t clear it, or the air returns within days, something upstream is feeding it. Gallegos Plumbing has diagnosed Ventura County water systems since 1996 — send us a message or call, and a licensed tech will trace it to the source with a flat, upfront quote before any work.