Pipes & water supply

Air in pipes causing sputtering faucets

Sputtering, spitting water from a faucet usually means air has gotten into the plumbing system, often after work on the pipes or a water main issue, and it typically clears on its own with running water.

Difficulty
Easy
Time
15–30 minutes
DIY cost
$0
Pro cost
$100–$300 (if underlying cause needs diagnosis)

Symptoms

  • Faucet sputters or spits before water flows smoothly
  • Noise of air hissing or gurgling from the tap
  • Problem noticed right after plumbing work or a water outage
  • Multiple fixtures affected around the same time

Likely causes

  • CommonAir introduced during recent plumbing repair workAny time pipes are opened for a repair, air can enter the system and needs to be purged out.
  • CommonWater main shutoff or municipal work nearbyA temporary water outage from utility work often lets air into the system when service resumes.
  • PossibleWell pump losing prime or air in the pressure tankFor well systems, air issues often trace back to the pump or a waterlogged tank rather than just trapped air in pipes.
  • Less commonA leak allowing air to be drawn into the lineA crack on the supply side under certain pressure conditions can pull in air alongside water.

What to do

  1. Run the affected faucet on cold for several minutes to help purge trapped air through the system.
  2. Start with faucets on the lowest floor of the house and work upward, since air rises and clears more easily from higher fixtures last.
  3. Check other fixtures throughout the house to see if the sputtering is widespread or isolated to one area.
  4. If the issue followed recent plumbing work, this is expected and usually resolves within a day of normal water use.
  5. For well systems, check the pressure tank and pump for signs of lost prime or waterlogging if sputtering continues (see the relevant well guides).
  6. If sputtering persists for more than a day or two with no clear cause, consider it may indicate a leak drawing in air.
  7. Contact your water utility if the issue coincided with visible street work, since they can confirm whether air was introduced system-wide.

Tools and parts

  • None typically needed

When to call a pro

Call a plumber if sputtering continues for more than a couple of days or seems to be getting worse rather than clearing.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.