Do I Need to Repipe My House? A 10-Question Check

Answer the questions

Answer from memory, a look at the basement or an inspection report. "Not sure" is a fine answer. A leak happening now shows its result straight away.

How the result is decided

The rules run in a fixed order and the first one that matches decides the result, so the same answers always give the same result. The result lists the answers that decided it.

If you said	The result
Water leaking now	Act now: limit the damage and call a plumber today. This outranks every other answer.
All the piping already replaced with a permit	No repipe indicated, or diagnose first if the symptoms are still there.
Galvanized, or gray pipe mixed with copper, plus constant rusty water, weaker flow upstairs or two or more leaks	Plan a whole-house repipe, or a partial for the galvanized that is left.
Copper with two or more leaks	Plan a whole-house repipe, after the walk-through looks for the cause.
A City or village notice that the service line is lead	Diagnose first, starting with the service line.
Weak water on every floor, basement included	Diagnose first: find where the pressure is lost.
One symptom: rusty water at first draw or from the hot tap only, one weak fixture, one leak, a damp spot	Diagnose first: one symptom has more than one possible cause.
A kitchen or bathroom remodel planned	Plan the piping with the remodel.
Not sure what the pipe is, in a building from before 1980 or of unknown age	Diagnose first: find out what the pipe is.
None of the above	No repipe indicated yet.

What this check cannot tell you

It cannot see inside walls. It does not know how far galvanized pipe has corroded, where a leak will come next, or whether a service line is lead until someone identifies it. Those answers come from a walk-through that starts at the meter and main shutoff.

It does not say whether any piping is safe. Brown water, low pressure and leaks each have more than one possible cause, and the service line, a valve or a water heater can produce the same signs as old piping. That is why several results say to diagnose first.

Repiping replaces the water supply piping. Sewer and drain lines are a separate trade and are not part of this check.

Next: estimate the cost for your building

How to identify your water pipes

Questions about the check

Can a plumber tell whether a house needs repiping without opening walls?

Enough to plan the job, yes. The walk-through starts at the meter and main shutoff, where the pipe is exposed, reads the static pressure at a hose bibb and compares flow at the lowest and highest fixtures. With the leak history, that shows whether the piping or something upstream is the problem. Walls are opened later, during the work, at fittings and turns.

Does a home inspection note about galvanized pipe mean the house has to be repiped?

Not by itself. The note records what the inspector saw, not how far the pipe has corroded inside. Galvanized with brown water, weaker flow upstairs or repeated leaks points to planning a repipe soon. Galvanized with none of those can be replaced on your own schedule, ideally before a remodel or a sale rather than after a failure.

What happens after the check says to plan a repipe?

A walk-through, then a written quote. The quote should list the wall openings and who closes them, where old pipe stays, the material, the permit, the working days and the water-off windows. During the work the new piping is pressure tested before the walls close and flushed after cutover, and the shutoffs are labeled.