Unexplained Spike in Your Water Bill
A 20% jump in usage with no change in habits is one of the clearest signals of a concealed supply line leak.
Leak Detection Repair
Leak Detection That Finds the Problem Without Wrecking Your Home
Hidden fixture and supply-line leaks cause water damage over time. Twin City Pipeworks finds and fixes the source. 1-year warranty on all work. Book online.
Prefer to call or text? 651-247-4495
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About Twin City Pipeworks
Why Homeowners Trust Us for Leak Detection Repair
A hidden leak under a sink, behind a fixture, or inside a wall adds up the longer it sits, and by the time you see a stain on the ceiling or a soft spot in the cabinet, water has usually been working at the surrounding material for a while. Twin City Pipeworks finds the source of fixture, supply-line, and under-sink leaks without tearing open every wall in the house. All work carries a 1-year warranty. Book online to get a leak looked at before a slow drip turns into a bigger repair.
Our process starts with checking the fixtures, supply connections, and accessible pipe runs to pinpoint where water is escaping, which means you're not paying to rebuild drywall we didn't need to cut. Once we've identified the problem, we walk you through the repair options clearly and give you upfront, per-task pricing before any work begins. What drives cost on a leak job is access difficulty, how the supply line is routed, and how long the leak has been running. A minor pinhole in an accessible supply line is a very different job from a leak inside a finished wall. Leak detection and repair can range from a few hundred dollars to well over a thousand, depending on those factors. Every job is different, and we give you upfront, per-task pricing before any work begins.
How We Find Leaks Without Tearing Up Your Home
Most plumbers find leaks the old-fashioned way: they cut open walls until they hit water. We don't work that way. Twin City Pipeworks has been in business 14 years, and we work methodically to protect your home while we do the diagnosis. We start at the fixtures and supply connections, then isolate sections of accessible supply line with pressure checks to find where a line holds and where it doesn't. We track moisture behind surfaces to narrow down the source before opening anything. You'll know exactly where we're going before we make a single cut. If your home in Woodbury or Stillwater has unexplained wet spots under a sink, a higher water bill, or the sound of water moving when everything is off, those are the signs we investigate first.
Why Twin City Pipeworks
Signs You Have a Leak That Needs Professional Detection
Some leaks announce themselves. Others hide for months and show up as a foundation crack or a mold problem. Here's what to look for.
Water Damage in the Bathroom
Soft spots in the floor around the toilet, staining at the base of the tub, or peeling paint near the shower wall are early warning signs, not cosmetic issues.
Sound of Running Water When Nothing Is On
That sound is water moving through a pipe under pressure to a place it's not supposed to go. Don't ignore it.
Mold or Musty Smell Behind Walls
Mold requires moisture. If you smell it and don't know why, there's a source feeding it, and it's probably behind a wall or under a floor.
Low Water Pressure Throughout the House
Pressure drops when water is escaping a supply line before it reaches your fixtures. A clogged fixture aerator won't cause this. A supply leak will.
Warped or Damp Cabinet Floor Under a Sink
Soft, warped, or discolored cabinet floors under a sink are a sign the supply or drain connection has been seeping. Catch it early and the repair stays small.
The Supply-Line and Fixture Leaks We See Most
The leaks we see most in east metro homes are at the supply connections behind sinks, toilets, and appliances, and in supply lines running through walls. A braided supply line at a faucet or toilet can fail at the compression fitting. An angle stop valve can weep where it has corroded. A pinhole can open in an aging copper or galvanized supply run inside a wall. None of these flood the house all at once, which is exactly why they get missed. They seep into the cabinet, the subfloor, or the wall cavity and run your water bill up quietly for months. The longer that goes, the more material gets damaged. For homes in Hugo and Mahtomedi with older supply lines, getting a leak located and repaired early keeps it from turning into a drywall and subfloor job. Get it on the schedule before the damage spreads.
What a Proper Leak Repair Includes
A real repair doesn't just stop the drip. It addresses why the line failed and what condition the surrounding pipe is in. Twin City Pipeworks is fully insured, and every repair comes with a 1-year warranty on parts and labor. We don't patch over a corroded section and call it done. If the pipe wall is compromised beyond the immediate failure point, we'll tell you that upfront. We also check for secondary damage: subfloor saturation, wall cavity moisture, and whether any water heater connections or fixture supply lines were affected by the same pressure event. After 14 years in the Twin Cities, Dave built this company around the principle that a repair is only worth paying for once.
Why Twin City Pipeworks
Quick Reference: What Leak Detection Covers
Homeowners often ask what falls under leak detection. Here's a direct answer.
Supply line leaks
Hot and cold supply runs inside walls and under sinks. A pinhole or a failed joint here seeps quietly until it shows up as a stain or a soft spot.
Fixture and appliance connections
The connections behind faucets, toilets, dishwashers, and ice makers. Braided lines and flex connectors fail more often than people expect.
Supply valve leaks
Angle stop and shutoff valves corrode and begin to weep at the stem or the packing nut. We replace the valve rather than chase the drip.
Under-sink drain connections
Trap and drain-arm connections under a sink can loosen or crack at the slip joints and drip into the cabinet every time you run water.
Outdoor faucet leaks
Hose bibs and frost-free sillcocks can crack from freezing and leak inside the wall when the faucet is turned on in spring.
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Get the Leak Found and Fixed
Water damage under a sink or behind a fixture doesn't reverse itself. The longer a hidden leak runs, the more it costs to fix. Twin City Pipeworks has served the east metro and St. Croix Valley for 14 years, and every job we do is backed by a 1-year warranty. We're fully insured. Book online to get on the schedule, or get an instant quote on a common repair with our online tool.
Prefer to call or text? 651-247-4495
Two easy ways to get started
- Book online — pick a visit time that works for you, no phone tag.
- Get a repair quote — common repair tasks priced in minutes with our online tool.
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Twin City Pipeworks
Ready to get it fixed right?
Honest, upfront pricing and a 1-year warranty on every job. Book your visit online, or get an instant quote on a common repair.
Prefer to call or text? 651-247-4495
Good to Know
Frequently Asked Questions
How much should a leak detection cost? +
Leak detection in the east metro typically runs $150 to $400 for the diagnostic portion alone, depending on how accessible the suspected area is. A drip at a visible supply connection is faster and cheaper to trace than a leak hidden inside a finished wall. We use upfront, per-task pricing, so you'll know the number before any work begins.
How much does leak detection charge? +
Most professional plumbers charge a flat diagnostic fee or an hourly rate with a minimum. Twin City Pipeworks uses flat-rate, upfront pricing so you know what the detection service costs before we start. What you pay for detection is separate from the repair quote, which we provide after we've identified the source.
What are the three types of leak detection? +
The three primary methods are acoustic detection (listening for the frequency of pressurized water escaping a pipe), pressure testing (isolating pipe sections to find where pressure drops indicate a breach), and thermal or infrared imaging (identifying moisture by temperature differential behind surfaces). Most jobs use at least two of these in combination. A single method alone can miss leaks in complex pipe runs.
Is there a way to find a water leak without opening up the wall? +
Yes, and it's how we work. By checking fixtures and supply connections first and isolating sections of supply line with pressure checks, we can narrow a hidden leak down to a small area before opening anything. That precision means one targeted access point rather than tearing into wall after wall. Careful detection isn't a gimmick. It's standard practice for any plumber who takes the time to do it right.
Can water damage in the bathroom mean I have a hidden supply line leak? +
Often, yes. Soft flooring, staining at the base of fixtures, or persistent moisture near the toilet or tub can indicate a supply line breach, a failed wax ring, or a cracked drain fitting behind the wall. What looks like a cosmetic issue is frequently a sign that water has been sitting inside your floor structure longer than it appears. We've seen subfloors in Twin Cities homes rotted through while the tile surface still looked intact.
How is a gas odor different from a water leak in terms of what to do? +
They're handled very differently. If you smell sulfur or a rotten egg odor near a gas appliance, that's a safety issue for your gas utility, not a plumbing appointment, so leave the building and call them from outside. A water leak is something we handle by appointment. That said, don't put a water leak off indefinitely. Even a slow drip behind a wall can saturate framing and feed mold growth in a closed wall cavity, so it's worth getting on the schedule rather than waiting months.
Does a sump pump problem cause the same symptoms as a supply-line leak? +
Not exactly. A failing sump pump typically shows up as basement flooding or standing water near the pit, especially after heavy rain. A supply-line leak usually presents as moisture in a cabinet, a higher water bill, or damp spots that appear without any storm. Both are worth getting looked at, but the diagnostic process is different. If you're unsure which you're dealing with, book a visit and describe what you're seeing.