Sewer Gas Leak & Odor Smoke Testing in Connecticut

A sewer smell inside your home is more than unpleasant. It can be a sign of a real problem with your drain or sewer system, and in some cases, sewer gas can pose a health risk. If you’ve noticed persistent odors and can’t find the source, TMS uses professional smoke testing to identify exactly where sewer gases are escaping into your home. It’s a fast, non-invasive diagnostic method that takes the guesswork out of finding hidden leaks and gaps in your plumbing system.

What Is Sewer Smoke Testing?

Smoke testing is a diagnostic technique used to find cracks, leaks, faulty seals, and improper connections in drain and sewer lines. Here’s how it works:

Non-Toxic Smoke Is Introduced: A safe, non-staining, non-toxic smoke is pumped into your plumbing system through a cleanout or access point.

Pressure Fills the Pipes: The smoke fills the interior of the drain and sewer lines under light pressure, reaching every connected pipe and joint.

Leaks Reveal Themselves: Anywhere the system has a crack, gap, failed seal, or improper vent, smoke will emerge. This makes the problem location immediately visible.

We Document and Diagnose: Our plumbers identify every location where smoke appears, document the findings, and recommend the appropriate repair for each issue.

Smelling sewer gas in your Connecticut home? Call TMS today: 860-342-8867.

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Common Causes of Sewer Odors Smoke Testing Can Find

Sewer smells can come from a surprising number of places. Smoke testing helps us track down all of them, including:

  • Cracked or broken drain pipes inside walls, floors, or ceilings
  • Dried-out or missing P-traps that no longer block sewer gas
  • Faulty or missing wax rings under toilets
  • Improperly installed or damaged vent pipes
  • Gaps or cracks at pipe connections and joints
  • Cleanout caps that are missing or not properly sealed
  • Improper plumbing configurations that allow gas to migrate into living spaces

Why Choose TMS for Sewer Gas and Smoke Testing in Connecticut?

Tracking down a sewer odor without the right tools is a frustrating process of elimination. TMS makes it fast and accurate:

Precise and Non-Invasive: Smoke testing finds problems that would otherwise require opening up walls or floors to locate. We pinpoint the issue first, then determine the least invasive way to fix it.

Safe for Your Home: The smoke we use is completely non-toxic and non-staining. It dissipates quickly and leaves no residue in your home.

Comprehensive Diagnosis: A single smoke test can reveal multiple issues at once, giving you a complete picture of your drain system’s condition rather than chasing one problem at a time.

Experienced Licensed Plumbers: Interpreting smoke test results correctly requires plumbing knowledge. Our team understands what they’re seeing and knows exactly how to address each finding.

100% Satisfaction Guaranteed: We stand behind our diagnostic work and our repairs. If you’re not satisfied, we make it right.

Sewer Gas Leak & Odor Smoke Testing in Connecticut FAQs​

Yes. The smoke used in professional sewer smoke testing is non-toxic, non-staining, and odorless or mildly scented. It dissipates quickly after the test is complete and does not leave any residue in your home. We’ll let you know what to expect before we begin and advise you on any precautions to take during the test.
Most residential smoke tests can be completed in one to two hours. The actual smoke introduction is relatively quick. The time is largely spent observing and documenting where smoke appears throughout the property. We’ll give you a time estimate when you schedule.
Once we’ve documented all the locations where smoke emerged, we’ll walk you through the findings and explain what each one means for your plumbing system. From there, we’ll provide repair options and clear pricing. Many issues found during smoke testing are straightforward fixes, such as replacing a wax ring or resealing a cleanout cap.
Sewer gas is primarily composed of methane and hydrogen sulfide. At low concentrations, the main concern is the unpleasant odor. At higher concentrations, sewer gas can cause headaches, nausea, and dizziness. In rare cases involving very high concentrations, it can be flammable or toxic. Persistent sewer odors inside your home should always be investigated and addressed promptly.
Yes. Intermittent sewer odors often point to a problem that worsens under certain conditions, such as changes in air pressure, temperature, or water usage. Smoke testing is still an effective way to find the source, even if the smell comes and goes. We can often reproduce the conditions that trigger the odor and identify the entry point during the test.

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