Common problem · TN LLP #5045

Sewage Smell in the House

A sewer or rotten-egg smell that keeps coming back.

Quick answer

Not usually an emergency, but do not ignore it — sewer gas in a house means there is an open path from the drain system into your living space. Most often it is a dried-out trap or a failed wax ring, both cheap fixes.

A sewer smell indoors is a sign, not just a nuisance. The drain system is supposed to be sealed from the house by water sitting in every trap and by properly vented pipework. When you can smell it, one of those seals has failed somewhere.

How you know this is it

A sewer or rotten-egg smell near a specific drain, or throughout a room
Smell that is worse in a guest bathroom or a floor drain nobody uses
A rocking toilet, or staining on the floor at its base
Smell that gets stronger when the washing machine or a tub drains

What usually causes it

A dried-out P-trap in a fixture that has not been used in weeks
A failed wax ring under a toilet, letting gas past the base
A blocked or improperly terminated vent, so the system cannot breathe and siphons traps dry
A cracked drain line inside a wall or under the floor
On well and septic properties, a venting problem at the tank end

Common questions

Sewage Smell in the House: your questions answered

The smell is only in the spare bathroom. Why?

Almost certainly a dried-out trap. The water seal in an unused shower or sink evaporates over a few weeks and the barrier is gone. Run the tap for a minute and see if it clears.

Is sewer gas dangerous?

In the concentrations most houses get, it is unpleasant rather than dangerous. It is still a sign of a real defect, and the fixes are usually inexpensive, so it is worth chasing down.

How do you find where it is coming from?

By elimination first, then by camera where it is not obvious. Guessing at drain problems is how people end up paying for the wrong repair.

Will I know the price before you start?

Yes. You get one number to approve before any work begins, and it holds once the job starts. This market has a documented habit of quotes climbing mid-job; we built the opposite habit deliberately.

Are you licensed?

Yes. Tennessee Limited Licensed Plumber #5045, issued by the state Board for Licensing Contractors and verifiable at verify.tn.gov. Across eighteen local competitors, not one publishes their number.

Book Drain Pros TN for drain cleaning.

Call for the fastest response, request service online, or send the form and we’ll reach out. Woman-owned and family-run, licensed, with straight pricing you approve before we start and 24/7 emergency service.

Call (423) 413-6876 Plumbing emergency? Call (423) 413-6876 Request service

TN Limited Licensed Plumber · #5045 · verify at verify.tn.gov

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