Know the Difference

What actually counts as a plumbing emergency?

The fastest way to tell if it's an emergency: is water actively moving somewhere it shouldn't be, or is it just inconvenient? If it's moving (through a burst pipe, a sewer backup, or a failing water heater), that's an emergency call that can't wait. If your faucet drips slightly when fully closed, that can wait until normal business hours.

After responding to thousands of calls across West Chester, Phoenixville, Downingtown, Exton, and communities throughout Chester County since 1948, we know that a repair costing hundreds can become a replacement project that costs thousands, if you wait to address it. The deciding factor is almost always time (and water).

Call immediately: do not wait

Can wait until regular business hours

Not sure which category you're in? Call us at (610) 400-8510. We're here to walk you through the issue and how to fix it.

Your Action Plan

The 5 steps to take before your plumber arrives

Each step below is ordered by urgency level to protect your home. Step one stops the active threat. Steps two and three prevent secondary damage that's often more expensive than the original problem. Steps four and five validate your insurance claim, should you make one, and limit how far the mess spreads.

1

Shut off the water, before anything else

The problem: Water is actively flowing where it shouldn't be, and every second it continues adds to damage and cost.

What to do: For a toilet, look for the oval-shaped valve on the wall behind or below the tank and turn it clockwise until it stops. For a sink, the supply valves are under the cabinet on the hot and cold lines. For a washing machine, there are two valves on the wall behind the unit. If you can't isolate the fixture or the leak is in the wall, go straight to your main water shutoff valve (in most Chester County homes, it's on the basement wall closest to the street, near where the water line enters). Turn it clockwise until fully closed. If it's a lever-style ball valve, perpendicular to the pipe means off.

Technician tip: Most homes in established Chester County neighborhoods (Eagleview, older Downingtown borough, West Chester's historic streets) have gate valves (round wheel) rather than ball valves. Gate valves take many full turns to close. Don't stop after one or two turns; keep going until it's snug.
2

Turn off the water heater once the main is off

Why this matters: Water heaters are designed to heat water that's constantly being replaced. If you shut off the main supply but leave the heater running, it may cause more serious temperature and pressure issues within the tank. For older tanks already near the end of their life (anything over 10–12 years), this can cause a secondary failure on top of your original one.

Gas water heater: Turn the dial on the unit to the "Pilot" setting. This keeps the pilot light going without running the full burner. Don't fully shut the gas unless you smell gas. If you do smell gas, shut it off at the meter outside and leave the building immediately, then call PECO at 1-800-841-4141. Electric water heater: Flip the circuit breaker labeled "Water Heater" in your electrical panel.

3

If water is near electrical, cut the power

The diagnosis: Water conducts electricity. A leak that finds its way to an outlet, switch box, or (most critically) your electrical panel creates an electrocution and fire risk that can escalate faster than the original water damage.

What to look for: Water pooling near outlets, light switches, or your panel. Discoloration or swelling on walls or ceilings near wiring runs. A burning or metallic smell. If any of these are present, shut off power to the affected area at the breaker. If there's any doubt about whether water has contacted your electrical system, do not touch anything. Call a licensed plumber before entering the area.

Technician note: You can't always see where water travels. When in doubt, cut the power first.
4

Document the damage before you clean anything up

Why it matters for your claim: Homeowner's insurance adjusters work from documentation, not from your word. A two-minute video walkthrough taken immediately after you shut off the water, showing the source, the spread, and the affected materials, can make the difference between full coverage and a dispute over "pre-existing conditions."

What to capture: Video the leak source. Pan slowly across any affected flooring, baseboards, drywall, and belongings. Note the water heater's age on the data plate if it's involved. Don't move anything significant until you've filmed it. Then take photos as backup.

5

Contain what you can and call a plumber

This step is about limiting spread. Place towels, mop buckets, or plastic bins under any active drips. Move rugs, furniture, and any electronics away from the water's path. Open windows or run a box fan to start drying the air, since moisture trapped in a closed room begins promoting mold growth within 24–48 hours in Pennsylvania's humid summers. Be cautious as you clean up if there are any electronics in the area.

If you're in Chester County (West Chester, Phoenixville, Downingtown, Malvern, Coatesville, Paoli, Exton, Chester Springs, Kennett Square, or any surrounding town), Mattioni provides same-day emergency plumbing service at (610) 400-8510. Our trucks are fully stocked; in most cases we diagnose and repair on the first visit.

Mattioni offers same-day emergency service across all of Chester County, PA.
When You Call

What to tell your emergency plumber, and why it speeds things up

You don't need a diagnosis before you call. That's what we're for. But a few things help our dispatch team put the right tech on your job with the right parts: a description of what you're seeing or smelling, whether you've already shut the water off and at which valve, whether water is near electrical, and any relevant history (a pipe that froze last winter, a toilet that's been running for weeks, a water heater you know is older). You won't always have answers to all of these. Tell us what you know and we'll take it from there.

From the Field

Why plumbing emergencies happen in Chester County homes, and what's really going on

Chester County is a study in extremes: new construction in Eagleview and Exton sitting a few miles from 100-year-old cast iron infrastructure in West Chester borough and Coatesville. Cold winters that consistently drop below 20°F. Hard water from the Brandywine watershed that accelerates corrosion. What we see in the field isn't random. The same conditions create the same failures, year after year. Here's what's actually happening when each emergency strikes.

Burst Pipes: The "Why" Behind the Flood

The problem: There's water flowing where it shouldn't be, or you come home to a wet basement.

What's actually happening: Water expands approximately 9% when it freezes. In any pipe that has water sitting still (a section in an uninsulated crawl space, an exterior wall cavity, or a garage utility room), that expansion has nowhere to go. The pipe may rupture silently as water freezes, and the damage begins when the ice thaws and water flows freely through the break.

Chester County specifics: Older homes in Downingtown borough and parts of Phoenixville often have supply lines running through exterior walls with minimal insulation, a common construction practice from the mid-20th century. Split-level homes are particularly vulnerable in the utility chase between floors. During a cold snap, if any faucet on an exterior wall has completely stopped flowing, treat it as a pre-burst emergency and call before it thaws.

What to do right now: Shut off the main. If you've caught it before a burst, open the faucet to relieve pressure and call us immediately.

Sewage Backups: Why the Whole House Is Affected

The problem: Sewage is coming up through your floor drain, your basement toilet, or your tub. Multiple fixtures may be backing up simultaneously.

What's actually happening: When a single fixture backs up, it's usually a localized clog at the trap or branch line. When multiple fixtures back up at once (especially when you flush the toilet and water comes up in the tub), that's your main sewer line. All drain lines in your home flow into one main line that exits through the foundation toward the municipal sewer or a septic system. If that main line is blocked or broken, everything backs up.

Chester County specifics: Homes in older sections of West Chester borough, Phoenixville, and Coatesville frequently have clay tile or orangeburg sewer lines that were installed in the 1940s–1960s. These are well past their service life. Tree roots find the joints in these older lines and infiltrate them aggressively. A sewer camera inspection is the only reliable way to know if you're dealing with a root intrusion, a full collapse, or a simple blockage.

What to do right now: Stop using every fixture in the house immediately. Don't flush. Don't run water. If your basement has an ejector pump, review the warning signs your sewage ejector pump is failing. Call for emergency service. This is a health hazard, not just a plumbing inconvenience. For more context, see our overview of common sewer issues in Southeastern PA homes.

Water Heater Failure: Reading the Warning Signs

The problem: You have a puddle under your water heater, or water discharging from a pipe on the side of the tank.

What's actually happening: Two different failures look similar but have different urgency levels. A pressure relief valve discharge (water coming from the small pipe that runs down the side of the tank) means your system has exceeded safe temperature or pressure. This is serious and should not be manually reset without understanding why it tripped. A tank failure (water pooling at the base) usually means the inner steel tank has corroded through. Most tanks fail from the bottom, where sediment accumulates and accelerates corrosion from the inside out.

Chester County specifics: Chester County's water, sourced largely from the Brandywine Creek watershed, is moderately hard, around 150–200 parts per million. This mineral content builds up as sediment in tank-style heaters, accelerating corrosion and reducing efficiency. A water heater that's more than 10 years old and beginning to show rust-colored water or a popping/knocking sound during heating is in its final phase of life. See our full breakdown of water heater replacement costs if yours is approaching 10-12 years old.

What to do right now: Shut off the cold water inlet valve at the top of the heater. Turn the gas dial to Pilot or flip the electrical breaker. Call us right away. Don't wait to see if it stabilizes.

Overflowing Toilets: When a Plunger Isn't the Answer

The problem: The toilet is overflowing or won't flush, and the standard plunger isn't clearing it.

What's actually happening: A toilet that responds to a plunger has a clog at the trap (the curved section at the base of the bowl). That's the best-case scenario. A toilet that doesn't respond to plunging, or that causes water to come up in other fixtures, has a blockage further down the line, often at a branch cleanout junction or in the main line. Continuing to flush or plunge against a deep blockage doesn't clear it; it pushes sewage further into your drain system and can force it up into other fixtures.

What to do right now: Shut off the supply valve behind the toilet. Stop flushing. If water came up in the tub or floor drain when you flushed, stop using all fixtures and call for emergency service. This has moved beyond a toilet issue to a main line issue.

Pro Tip
The single most-missed sign of an impending plumbing emergency in Chester County homes is a floor drain in the basement that smells like sewage but isn't actively backing up yet. That odor means the water seal in the trap has dried out, or that your main line is under pressure. If you're smelling sewage from a floor drain, pour a quart of water into it. If the smell persists after the seal refills, call us before you have a backup.
What Happens Next

What to expect when Mattioni arrives

When a Mattioni technician arrives at your Chester County home, the first thing they're going to do is look, not start opening walls. Every emergency response starts with a full assessment: where the water is, where it came from, where it's going, and whether there are secondary concerns like electrical exposure or structural risk.

After the assessment, we'll explain what we found in plain language, not in a way that requires a plumbing license to understand. You'll know the problem, your options, and the flat-rate price before we touch anything. No hourly billing. You decide whether to proceed, with full information, before work begins.

Our trucks are stocked for the most common Chester County emergency repairs: burst copper and PEX supply lines, main shutoff valve replacements, water heater replacements, sewer cleanouts. For the majority of calls, we complete the repair on the first visit. We've been serving this community since 1948, and part of that longevity is not making homeowners wait three days for a part we should have had on the truck.

Pro Tip
If we respond to a burst pipe in an uninsulated exterior wall, we don't just replace the failed section and leave. We look at the run of pipe on both sides of the break. If the conditions that caused one section to freeze exist for adjacent sections, we'll tell you and give you the option to address it before the next cold snap. One repair is cheaper than two emergency calls.

We serve Chester County homeowners in West Chester, Phoenixville, Downingtown, Malvern, Kennett Square, Paoli, Exton, Chester Springs, Coatesville, and Eagleview, as well as communities throughout Delaware and Montgomery counties. We're family-owned and locally operated. Homeowners looking to stay ahead of emergencies can also explore our VIP Membership, which includes priority service and preventive maintenance visits. We treat your home the way we'd want ours treated.

✓ Flat-rate pricing, no hourly billing
✓ Same-day emergency service
✓ Fully stocked trucks, most repairs first visit
✓ Locally owned and operated since 1948
Frequently Asked Questions

Questions Chester County homeowners ask most

Yes, in most cases, especially if water is pooling at the base of the tank rather than dripping from a fitting above it. A pool at the base typically means the inner tank has corroded through, and a corroded tank doesn't stabilize on its own. Shut off the cold water inlet at the top of the heater and cut power or gas to the unit. Call Mattioni for same-day service; we stock a range of water heater sizes and can typically replace the unit on the same visit.
Shut off the water. Either at the fixture's local shutoff valve (behind the toilet, under the sink, or behind the washing machine) or at your main shutoff valve in the basement. Nothing else matters until the water source is off. Every minute of active flow is more damage. Call your plumber after the water is stopped, not before.
Cost varies significantly depending on what failed and how extensive the repair is. A burst supply line section is very different in scope from a collapsed main sewer line. Mattioni uses flat-rate pricing; you receive a complete price before any work begins, with no hourly billing and no mid-job surprises. Review our plumbing pricing page for ranges, or call (610) 400-8510 and we can discuss your situation before we arrive.
Yes: Mattioni provides same-day emergency service throughout Chester County, including West Chester, Phoenixville, Downingtown, Malvern, Exton, Paoli, Kennett Square, Coatesville, Chester Springs, and Eagleview. We also serve surrounding communities in Delaware and Montgomery counties. Mattioni has been working in these communities since 1948, so our technicians know local infrastructure well, including the older cast iron lines in West Chester borough and Phoenixville that require a different approach than newer PVC systems.
Stop using every plumbing fixture in the house immediately. When the main sewer line is blocked or damaged, every flush and every drain adds hydraulic pressure to a system that has nowhere to go. That pressure looks for the lowest exit point (usually a basement floor drain or the toilet on the lowest level) and pushes sewage back into your home. The faster you stop adding water to the system, the less cleanup you'll have.
In most Chester County homes, the main shutoff is in the basement or utility room on the wall closest to the street, which is where the water service line enters the foundation. It's typically a gate valve (round wheel handle, requires many turns) or a ball valve (lever handle, quarter-turn to close). In older homes in West Chester and Phoenixville, it's often a gate valve mounted low on the wall, sometimes painted over. We strongly recommend finding yours before you're standing in two inches of water looking for it, and reviewing our guide on what to do when pipes burst so you're prepared.
Only if the water is off and your repair is temporary containment (wrapping the split section with a rubber pipe repair clamp from a hardware store to slow or stop a drip until we arrive). Do not attempt to solder, replace, or cut pipe sections while the main is on, while water is actively flowing, or if the failed section is near electrical. A temporary clamp buys time; it is not a permanent fix and shouldn't be left in place beyond the emergency. We'll make the proper repair when we arrive.
Pro Tip
Seasonal tip for Chester County homeowners: The highest-risk window for frozen pipe emergencies in our area is typically December through mid-February, when overnight temperatures consistently drop into the teens. If you're leaving for more than 48 hours during this period, set your thermostat no lower than 55°F and shut off the main water supply if you'll be gone more than a week.