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How Do I Prevent Frozen Pipes in Lowell?

A New England winter checklist and safe ways to thaw a frozen line.

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Updated October 2026 · By Lowell Plumbing Pros · Rules linked to official sources

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Direct answer

To prevent frozen pipes in a Lowell winter, keep the heat steady day and night, including in vacant units; open cabinet doors on exterior walls; let a faucet drip during the coldest nights; shut off and drain outdoor spigots from inside each fall; and insulate or seal pipes in garages, porches and crawlspaces. Never thaw a pipe with an open flame.

Before winter: the fall checklist

  • Shut off the inside valve to each outdoor spigot, then open the spigot outside to drain it
  • Disconnect garden hoses
  • Insulate exposed pipes in garages, crawlspaces, unheated porches and basements near outside walls
  • Seal drafts where pipes pass through exterior walls, sill plates and foundation gaps
  • Have the boiler serviced so the heat does not fail during a cold snap
  • Know where your main shut-off is, and make sure it turns

During a cold snap

  • Keep the thermostat steady day and night; do not set it far back
  • Open kitchen and bathroom cabinet doors on exterior walls
  • Let a cold faucet on an exterior wall drip slightly
  • Keep garage doors closed if pipes run through the garage
  • In rentals, keep heat on in vacant units
  • If you travel, leave the heat on and ask someone to check the house

How to thaw a frozen pipe safely

  1. Open the faucet the frozen line feeds.
  2. Apply gentle heat to the exposed section: a hair dryer, warm towels or a space heater kept away from anything flammable.
  3. Never use an open flame, a torch, or a propane heater indoors.
  4. Watch for leaks as it thaws. If water appears, close the main shut-off and call.
  5. Call a plumber if you cannot reach or find the frozen section, or it is inside a wall.

Lowell-specific note

Where pipes freeze in Greater Lowell

In Lowell’s triple-deckers, pipes often run along exterior walls and through enclosed back porches and stairwells. In the surrounding towns, crawlspaces under additions, pipes above garages and finished-basement walls are frequent freeze spots. Rentals between tenants are at risk when the heat is set too low.

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Related questions

Pipes in unheated or exposed spaces are at risk whenever outdoor temperatures stay well below freezing, especially overnight and with wind. Exterior-wall and porch pipes in older Lowell homes freeze first.

During the coldest nights, a slight drip from a faucet on an exterior wall keeps water moving and relieves pressure, which helps prevent bursts.

Keep the heat on and steady; many guides suggest no lower than the mid-50s °F. Ask someone to check the house during a cold snap.

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