A persistent sewer smell isn't a cleaning issue — it's a plumbing failure. We find the exact source with smoke tests and cameras.
A persistent sewer smell inside a home is rarely random. It is a symptom of a specific failure — a dried-out trap, a cracked vent stack inside a wall, a compromised wax ring under a toilet, a partial blockage growing biofilm. Different causes. Same smell. Completely different fixes.
Air fresheners, drain cleaners, and bleach pours don't solve any of them. They mask the symptom for a few hours and let the underlying problem keep advancing.
Reliant Plumbing Service handles sewer odor diagnostics across Austin the way the work should actually be done — by finding the source first, then quoting the fix. Our technicians arrive with smoke-testing equipment, sewer cameras, and pressure-decay tools so the inspection produces an answer instead of a guess.
Most homeowners in Austin describe the same handful of symptoms. Each one points toward a different failure pattern.
Strongest near the toilet, especially after flushing? That points to a wax ring failure or a flange seated below the finished floor.
Hydrogen sulfide. Almost always a dry P-trap on a fixture you don't use often, or biofilm building up on the drain walls.
When the smell isn't localized, the issue is usually in the venting system. A vent stack that has cracked inside a wall...
If the smell appears specifically after hot water runs, you're heating biofilm. This is a sign the drain needs a hydro jet wash.
Each service is priced and scoped differently because each one solves a different failure.
Book this when you don't know where the smell is coming from. Smoke test, camera inspection, and written diagnosis.
Click Here to Call (888) 466-2103Pressure-test the drain-waste-vent system to confirm where it's losing seal.
Click Here to Call (888) 466-2103Localized drain smells — focused diagnosis with trap inspection and scoping.
Urgent dispatch for households with vulnerable individuals experiencing symptoms.
The technician asks where the smell is strongest, when it appears, what makes it worse.
Of all accessible plumbing — under sinks, behind toilets, cleanouts, roof vents.
Of the entire drain-waste-vent system.
Of flagged lines and main sewer line.
Findings, recommended fixes with separate pricing. You decide next steps.
"It just needs more bleach down the drain."
Reality: Bleach kills surface bacteria temporarily. It does nothing for vent failures, wax ring failures, or cracked pipes.
"Old houses just smell that way."
Reality: A properly maintained system from 1920 won't release sewer gas.
"The smell will go away when the weather changes."
Reality: Weather only affects how noticeable it is. The leak remains.
Homeowners across Austin describe the same frustrating pattern. The smell shows up. They pour bleach, then enzyme cleaner... The smell fades for two days. Then it returns — sometimes worse than before.
Drain cleaners work on the surface. Bacteria rebuild biofilm in 48-72 hours. If the underlying conditions haven't changed, the smell returns.
If the smell is from a failed vent or damaged seal, no cleaner will fix it. The only reliable way is proper diagnosis with smoke testing and camera inspection.
At low concentrations it causes headaches, nausea, and fatigue. At higher concentrations it's toxic. It's also flammable.
Most diagnostic visits take 60 to 120 minutes on site. We try to schedule same-day inspections when symptoms suggest active gas exposure.
Almost never during the diagnostic itself. Smoke testing and camera scoping are non-invasive.
Because cleaning isn't the right fix for that smell. If the smell is from a venting failure or a wax ring, cleaning doesn't touch the cause.
Yes. Restaurants, medical offices, and multi-tenant properties are common clients.
Book a professional diagnostic today. Get a clear written report and honest repair options.
Click Here to Call (888) 466-2103