Leaking Pipe? Fix It Before It Bursts
Urgent Pipe Leak Repair
Pinhole leaks, dripping joints, and corroded pipe are early warnings. A pipe leak repaired now is faster, cheaper, and far less damaging than a burst pipe later.
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A pipe is leaking — what should I do right now?
Close the nearest shutoff valve — under the sink, behind the toilet, or on the line itself — or the main if that pipe has no valve. Put a bucket under the drip and move anything that can be damaged. If water is spraying or the leak is getting worse, treat it as a burst pipe. Then call or text and tell us where the leak is.
At a Glance
- Service
- Pipe leak repair: pinhole leaks, leaking joints, corroded and aging pipe
- Provided by
- Urgent Plumber NYC
- Where
- All five NYC boroughs — Queens, Brooklyn, Manhattan, the Bronx, and Staten Island
- When
- 24 hours a day, 7 days a week, including holidays
Last updated
A leaking pipe rarely stays small. A drip at a joint, a pinhole in copper, or a corroded section of old steel pipe lets water out slowly at first, but it soaks everything around it, and a weakened pipe can give way completely. Fixing a pipe leak early is the difference between a quick repair and a flooded ceiling.
Pipe leak repair covers the leaks you can see or trace to a pipe: under sinks, behind toilets, at the water heater, in the basement, or at a damp spot in a wall. If water is pouring out, go to Pipe Burst Repair. If water is coming through a ceiling from somewhere above, see water leak repair. If you can't find the source at all, start with leak detection.
If a Pipe Is Leaking Right Now
- Find the closest shutoff: under the sink, behind the toilet, beside the water heater, or a valve on the line itself. Turn it clockwise until it stops.
- No valve on that line? Close the main. In an apartment it's often under the kitchen sink or in a utility closet; in a house, on the basement wall where the water line comes in.
- Catch the water: a bucket under the drip, towels around it, and electronics, boxes, and rugs moved away.
- If the leak is above a ceiling or inside a wall, tell your super or the unit above. The pipe may serve more than one apartment.
- Call or text and tell us where the pipe is, what it looks like if you know (copper, gray steel, plastic), and whether it's a drip, a steady stream, or getting worse.
What Not To Do With a Leaking Pipe
- Don't count on tape or putty. Wraps and epoxy can slow a drip for a while, but they won't hold on corroded pipe or under full pressure for long.
- Don't crank down on a corroded fitting. Old galvanized joints can snap, turning a drip into a burst.
- Don't let a "small" drip run for days. Even a slow leak soaks subfloors and drywall, and in an apartment building it shows up in the unit below.
- Don't open walls or ceilings to hunt for it. If you can't see where it's coming from, leak detection finds it with far smaller openings.
Where Pipe Leaks Start in NYC Homes and Buildings
Most pipe leaks start at a weak point: a threaded joint on old galvanized steel, a pinhole in copper, a fitting under a sink, the supply lines to a toilet or faucet, or the valves around a water heater or boiler. In pre-war buildings, galvanized supply pipe corrodes from the inside, so a leak at one joint often means others on the same run aren't far behind.
Where the pipe is changes who's involved. A leak in a riser or inside a shared wall usually has to be shut off for every apartment on that line, so in Manhattan and Brooklyn apartment buildings the super is part of the repair. In a one- or two-family house in Queens or Staten Island, the pipe and the shutoff are usually right there in the basement.
Signs of a Leaking Pipe
A drip or bead of water on a pipe
Water forming on a joint, valve, or fitting is a leak, even a slow one. Green or white crust on copper and rust streaks on steel are signs it has been leaking for a while.
A small, persistent damp spot
Especially on a ceiling, wall, or floor near where pipes run — even if it seems to dry out between appearances.
A drop in water pressure
Sudden or gradual pressure loss can indicate internal corrosion narrowing the pipe, or a small leak bleeding off pressure elsewhere in the line.
Discolored water
Rusty or brownish water, especially right after the tap has been off for a while, often points to corroding galvanized pipe.
Knocking or banging pipes
Sometimes just water hammer from a fast-closing valve, but persistent knocking can also mean a pipe has come loose from its mounting.
A rising water bill with no clear cause
A slow leak inside a wall or under a slab can run for weeks before it becomes visible anywhere.
Common Causes in NYC Buildings
Aging galvanized steel
Common in pre-war buildings, galvanized pipe corrodes from the inside out — by the time you see rust-colored water, the pipe interior has often narrowed significantly.
Old cast iron drain lines
Cast iron can develop cracks and scaling over decades, leading to slow leaks and eventual blockages as the interior roughens.
Temperature swings and freeze-thaw stress
Pipes running along exterior walls or through unheated spaces expand and contract repeatedly through NYC winters, weakening joints over time. If one has already frozen, see Frozen Pipe Help & Repair.
High water pressure
Consistently high building pressure accelerates wear at joints and fittings, especially on older plumbing not rated for it.
Repair vs. Replace
The right fix depends on the pipe's material, age, and how isolated the problem is.
Diagnosis
Your plumber identifies the exact pipe, material, and likely cause — often by tracing sound, moisture, or pressure changes back to the source.
Localized repair when it makes sense
A single failing joint or a short corroded section can often be cut out and replaced without touching the rest of the line.
A repiping conversation when it doesn't
If a pipe run shows multiple failure points, patching one spot often just delays the next one. You'll get a straight answer about whether a larger repipe is the more sensible option — and why.
What Affects the Cost of a Pipe Leak Repair
- Where the leak is
- An exposed pipe under a sink or in a basement is quick to reach. A pipe inside a finished wall or ceiling needs a small, careful opening first.
- Pipe material and condition
- A single bad copper fitting is a short repair. Corroded galvanized pipe often has to be replaced back to a sound section, not just at the drip.
- One leak or several
- Several leaks on the same run usually mean replacing that run rather than patching each spot.
- Building access and shutoffs
- In an apartment building, shutting a riser or reaching the pipe can mean coordinating with the super and the neighbors on that line.
Reducing the Odds of a Repeat Problem
Once a pipe issue is repaired, a few habits make a real difference in how long the fix lasts. Keeping an eye on water pressure matters most — consistently high pressure is one of the more common accelerants of pipe wear, and a pressure-reducing valve is a reasonable, one-time fix if your building's incoming pressure is running high.
In winter, keeping cabinet doors open under sinks on exterior walls lets warmer room air reach the pipes, and knowing where your main shutoff is before you need it in a hurry saves precious time if something does go wrong later.
Frequently Asked Questions
A small leak that's stable and contained can often be scheduled within a day or two. But it's worth having it looked at promptly — small leaks in old pipe are frequently a sign of broader corrosion, not an isolated event.
Galvanized pipe has a dull gray, sometimes slightly silvery finish and is magnetic. If your building predates the 1960s and you haven't had a repipe done, there's a reasonable chance some galvanized pipe is still in place.
Whenever a localized repair is the sound choice, that's what's recommended. A full repipe is only suggested when the evidence points to a wider problem, and it's explained clearly before you decide.
It's the banging sound caused by water suddenly stopping in a pipe, usually from a fast-closing valve. On its own it's mostly a nuisance, but persistent water hammer stresses joints over time and is worth having checked.
Yes — corroding galvanized pipe can affect water clarity and taste. If you're seeing discolored water regularly, it's worth a proper look rather than waiting it out.
Yes. Consistently high pressure stresses joints and fittings well beyond what most residential plumbing is built for, and it's a common contributor to pipes failing earlier than they should.
Only if you're noticing symptoms — sound, dampness, pressure changes, or discolored water. Pipes that show no symptoms generally don't need proactive intervention just because they're old.
As a stopgap on a slow drip, a pipe clamp or epoxy putty can help, but turn the water off first if you can. Neither is a lasting repair, especially on corroded pipe, so tell the plumber what you put on.
In a rental, plumbing repairs are generally the landlord's responsibility. In a co-op or condo, it depends on whether the pipe serves only your unit or the building, and on the proprietary lease or bylaws. Tell your super or management either way, especially if the unit below could be affected. This is general information, not legal advice.
Usually because the pipe around the old repair is in the same condition as the part that failed — common with corroded galvanized steel. If a section leaks twice, replacing that run back to sound pipe is often the better fix.
Leaking pipe? Fix it before it bursts.
A drip at a joint, a damp spot that keeps coming back, or rust-colored water — call or text and get it repaired before it becomes an emergency.
Copy the number and the message template above to text us from your phone.