Severe Congestion? Check Your Plumbing!

Plumbing may not be the first thing you consider with persistent congestion, but sewer odors should get your attention.

Our Experience

One of our sons struggled with severe nasal congestion around the clock for months. He was miserable, his sleep and daily life were affected, and we could not determine the cause.

During that same period, we occasionally noticed a sewer odor in the laundry room next to his bedroom. After replacing an old drum trap behind the washing machine, the odor disappeared and his congestion cleared.

Based on the timing and what we discovered, we strongly believe the sewer odor was the cause of his persistent congestion. The experience taught us not to ignore recurring sewer odors or underestimate their potential impact on indoor air quality.

Plumbing Conditions That Can Allow Sewer Gas Indoors

Plumbing fixtures and drains have traps that hold water. This water creates a barrier that helps prevent sewer gases from entering the home. When the water seal is lost, sewer odors may enter the living space.

Dried Floor Drains

Floor drains also have traps concealed below the floor. When a drain is rarely used, the water inside the trap can evaporate.

Periodically pour water into seldom-used floor drains to refill the trap and help block sewer gas.

S-Traps

S-traps are not compliant with modern plumbing standards and are notorious for self-siphoning. As water drains, it can pull water from the trap and eliminate the protective water seal, allowing sewer gases to enter the home.

Drum Traps

Drum traps are commonly found in older homes and may collect lint, hair, sediment, and debris. Their covers, seals, or connections may also deteriorate and allow sewer gas to escape.

The presence of a drum trap does not automatically mean it is defective, but recurring odors should be evaluated.

Do Not Overlook the Crawlspace

We have found uncapped plumbing vents and sewer laterals with holes inside crawlspaces. Through the stack effect, air from the crawlspace can enter the living space and potentially carry sewer odors with it.

Persistent congestion can have many causes. However, when it occurs alongside sewer odors, the plumbing system should not be overlooked.