Leaks, pipes & freezing · Boston
Frozen pipe thawing in Boston, MA
If a faucet gives no water or only a trickle after a hard freeze, a pipe is frozen. Leave that faucet open, warm the area gently, and call a plumber if you can't find the frozen section or if it's inside a wall, because a split pipe will leak as soon as it thaws.
- Licensed local plumbers
- The problem explained before work starts
- Price agreed before the job begins
Frozen pipe thawing for Boston homes
Cold snaps can arrive fast. An arctic front can drop temperatures 30 to 40 degrees in an afternoon, and pipes in exterior walls, garages, crawl spaces and over unheated soffits freeze first. Homes with pipes run along north-facing walls, or kitchens over a garage, see the same freeze every winter.
For the full guide, including what you can safely do before a plumber arrives, see frozen pipe thawing explained.
Frozen pipe thawing in Boston at a glance
- Urgency
- Can be an emergency: shut off the water and call
- Area
- Boston, MA
- Who does the work
- An independent, licensed local plumber
- Permit
- Plumbing permits are issued by Boston's Inspectional Services Department (ISD), and work must be done by Massachusetts-licensed plumbers.
- Typical steps
- Locate the freeze → Thaw safely → Check for splits → Prevent the next one
- Availability
- Call now to check plumber availability
Signs you need frozen pipe thawing in Boston
- No water, or a trickle, from one faucet or one side of the house
- Frost on an exposed pipe in a garage or crawl space
- A toilet that won't refill
- Banging or groaning when a faucet is opened
- A sewer-like smell from a drain (ice can block the vent or drain too)
Local conditions
Frozen pipe thawing in Boston: what's different
Nor'easters and January cold snaps freeze pipes in Boston triple-deckers and row houses, especially along exterior walls and in enclosed back porches. In stacked units, a frozen line upstairs can burst and leak through every floor below.
A plumber locates the frozen section, thaws it without open flame, and checks for splits before the water is fully turned back on. Massachusetts requires licensed plumbers for most work, and insulating or rerouting porch lines prevents a repeat.
- Water and sewer in Boston
- The Boston Water and Sewer Commission provides water and sewer service.
- Permits in Boston
- Plumbing permits are issued by Boston's Inspectional Services Department (ISD), and work must be done by Massachusetts-licensed plumbers.
Boston housing and plumbing
Triple-deckers, brownstones and row houses, many over a century old, typically have basements, cast-iron drains and older service lines.
Neighborhoods and ZIP codes
Plumbers on Thawline cover Boston and Suffolk County, including Dorchester, Jamaica Plain, South Boston, Roslindale, Charlestown, West Roxbury. ZIP codes: 02108 · 02109 · 02110 · 02111 · 02112 · 02113.
Other Boston conditions that affect plumbing
- Frozen pipes: Nor'easters and cold snaps freeze pipes in exterior walls and porches.
- Old drains and stacks: Cast-iron stacks in triple-deckers crack and leak with age.
- Lead service lines: BWSC runs a lead service replacement program for older homes.
- Old water mains: Boston's water system is one of the oldest in the country, and older homes may connect through aging service lines.
How frozen pipe thawing works in Boston
- 1
Locate the freeze
The plumber traces the line from the dead fixture back toward the main, checking exterior walls, garage ceilings and crawl spaces.
- 2
Thaw safely
Controlled heat such as a heat gun, heat tape or an electric pipe thawing machine is used. Never an open flame.
- 3
Check for splits
As water starts to move, the section is watched for leaks before the faucet is closed and full pressure builds.
- 4
Prevent the next one
Options include insulation, heat cable, sealing air leaks around the rim joist, or moving the pipe into a heated space.
What affects frozen pipe thawing cost in Boston
Every job is priced by the plumber after they see it. These are the things that move the price most. Ask for the price before work starts.
- How easy the frozen section is to reach
- Whether the line split while frozen
- Number of frozen runs
- Adding heat cable or rerouting a pipe
Frozen pipe thawing questions in Boston
Which pipes freeze first in Boston triple-deckers?
Should I drip my faucets in a cold snap?
How long does it take a pipe to freeze?
Can a frozen pipe thaw on its own without damage?
Also in Boston
Related
Related plumbing services
Burst pipe repair
Turn off the main water shutoff first, then open a faucet on the lowest floor to drain the lines.
Learn more
Frost-free hose bib repair
A frost-free hose bib keeps its valve inside the heated house, but it still splits if a hose is left attached in freezing weather, because water can't drain out.
Learn more
Leak detection
Turn off every fixture and watch the water meter's leak indicator.
Learn more
Repiping
Repiping replaces a home's water supply lines, usually because old galvanized steel has corroded or polybutylene is at risk of failing.
Learn moreGuides
Read before you call
Emergencies
What to do when a pipe bursts
Shut off the main water valve, open the lowest faucet in the house to drain the lines, turn off the water heater, and cut power to any room where water is reaching outlets. Then call a plumber, photograph the damage, and call your insurer.
Winter & freezing
How to prevent frozen pipes in a Colorado winter
Before the first hard freeze, disconnect hoses, blow out the sprinkler system and seal air leaks near pipes. During a cold snap, keep the heat at 55 °F or higher, open cabinet doors on exterior walls, and let faucets on outside walls drip.
Winter & freezing
How to winterize outdoor faucets and sprinklers
Disconnect every hose, check that hose bibs are frost-free or shut off and drained from inside, have the sprinkler system blown out with compressed air, and drain or insulate the backflow preventer. Do it before the first hard freeze, often in October on the Front Range.
Need frozen pipe thawing in Boston?
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