Burst pipe repair cost

Repairing a burst pipe costs $150 to $1,200 for the pipe itself, typically around $600. What turns that into a $5,000 bill is not the plumbing. It is the drywall, the flooring and the drying.

The repair is often an hour of work. The water damage is the project.

What the repair costs

The last three rows are why two burst pipes with identical plumbing bills can differ by $6,000.

The first ten minutes decide the cost

Shut the water off at the main. Then open the lowest faucet in the house, which drains the pressure still sitting in the pipes and stops the leak feeding itself.

Then, in order: photograph everything before you move it, get standing water out, move furniture and anything absorbent off wet flooring, and get air moving.

Water in a wall cavity begins growing mold in 24 to 48 hours. That is the deadline that turns a repair into a remediation, and it is why a drying company on the same day is cheaper than a cheaper one on Thursday.

Why pipes burst

Freezing is the common one, and it does not burst the pipe where the ice is. Ice expands and pushes water along the pipe toward a closed faucet; the pressure builds between the ice and the faucet, and the pipe fails at the weakest point in that stretch. That is why the split is often several feet from the frozen section.

Pressure. Municipal supply above about 80 psi stresses every joint in the house. A $15 gauge on an outside faucet tells you in ten seconds. Above 80, a pressure reducing valve costs $350 to $800 and pays for itself.

Corrosion. Galvanized steel from before about 1960 corrodes from the inside and fails without warning. Copper in aggressive water develops pinholes.

Age and material. Polybutylene, installed widely between 1978 and 1995, fails in ways that made it the subject of a class action. If you have gray plastic supply pipe with crimped fittings, that is what it is, and it is a repipe conversation.

Repair or repipe

One burst in a copper system that is otherwise sound is a repair.

Repipe when:

• The pipe is galvanized steel or polybutylene
• This is the second or third failure in two years
• The plumber shows you pinholes elsewhere on the same run
• The house is being renovated anyway and the walls are open

A PEX repipe costs $4,500 to $12,000 and copper $8,000 to $22,000. Against $600 a time plus drywall, three failures makes the maths obvious.

Preventing the freezing one

• Disconnect and drain outside hose bibs before the first freeze, every year
• Insulate pipes in crawl spaces, attics, garages and against exterior walls
• Below freezing, open cabinet doors under sinks on exterior walls so house heat reaches the pipes
• In a hard freeze, let one faucet furthest from the main run a pencil-thin stream
• Leaving for the winter: shut the main, drain the system, and leave the heating at 55°F rather than off

Frequently asked questions

Will insurance pay for it?

Sudden and accidental water damage is normally covered. The pipe itself usually is not, and gradual leaks are typically excluded. Frozen pipes are covered in most policies if you maintained heat in the house, which is why the 55°F rule matters.

How do I know there is a leak inside a wall?

A water meter test settles it: turn off every fixture, note the meter, wait two hours without using water, and read it again. Any movement is a leak. Other signs are a warm patch on a floor, a stain that returns after painting, and a bill that jumped without explanation.

Can I patch it with a repair clamp myself?

A clamp is a legitimate temporary measure on a straight section of copper or steel, and it will hold for days rather than years. It is not a repair, and an insurer who sees one may treat what follows as neglect.

Why did it burst several feet from where the pipe froze?

Because the ice pushes water toward a closed faucet and the pressure builds ahead of it. The pipe fails wherever that stretch is weakest, not where it is coldest.

Should I turn the water back on myself once it is fixed?

Slowly, watching the repair. A fast-opening main valve sends a surge through the system that finds the next weak joint.