Key Takeaways
- Persistent sewage smell in house may indicate dry traps, clogged vents, or pipe damage.
- Sewer odours can pose health risks and may indicate a broken sewer line or inadequate drainage.
- Addressing the smell early helps avoid costly plumbing repairs and protects your home.
- Contact Lew Plumbing for drainage and sewage-related issues in Vancouver and nearby areas.
When your home starts to smell like sewage, it can be a sign that something is wrong with your plumbing. Sewage smell in house can pose health risks if left unchecked.
According to research, exposure to hydrogen sulfide (a common gas in sewage systems) can cause headaches and nausea when present in high concentrations. You should never ignore sewer smells, even when they appear small at first.
In many homes across Canada, the same problem exists. Finding the cause early helps avoid major repairs. It also protects your home from costly damage.
In this blog, Lew Plumbing will explain what can cause these odours.
Why Does My Bathroom Smell Like a Sewer?
There can be different reasons, such as dry drain trap or organic buildup inside the drains. Each of these issues can allow sewer gases to escape into your living space.
Dry P-trap
A dry P-trap often causes sewer odours in the home. This curved pipe under the sink or shower holds water to block sewer gases from passing through.
When there is no water in the pipe, it stops functioning as a seal. The smell then spreads into your home. This often occurs in guest bathrooms or basement showers that are rarely used.
Clogged Vent Pipe
A blocked vent pipe can also cause smells. Vent pipes let air pass through the plumbing system. This helps waste water move without any trouble.
When the pipe faces a blockage, pressure rises inside the line. As a result, sewer gas may come back through the drains and spread into your bathroom.
Residues and Buildup
Bad smells from a drain may come from bacteria or slimy layers called biofilm. These form when soap or food bits stay inside the pipe for too long. Once this buildup grows, it emits a foul odor that escapes through the drain.
In some cases, the odour points to a deeper issue. A loose pipe joint or a small crack in the line can let gas leak out without leaving any water behind. Even without visible damage, these weak spots still let sewer smells enter your home. In such cases, timely plumbing repair is important to prevent further problems.
Is a Broken Sewer Line the Culprit?
A broken sewer line can cause strong odours inside your home. When a pipe collapses sewage and gas may escape into the ground. These gases often travel through the soil and find their way indoors.
You might notice signs outside before the smell becomes obvious.
- Patches of grass that look soggy can be early warnings.
- Dips in your lawn can also appear if the soil erodes around a leaking pipe.
- Pests like cockroaches or rodents may enter through gaps in damaged pipes, which adds to the concern.
- Slow drains or repeated backups are common symptoms.
Sewer line issues are part of a larger drainage problem. Lew Plumbing offers drainage services to help detect and fix such issues early. Our team can inspect your system and provide solutions before the problem affects your home.
Other Common Sources of Sewage Smell in the House
A sewer-like smell can come from more than just your bathroom or main sewer line. Here are other areas in the home that can cause this problem.
Kitchen Sink
Grease and food waste often collect inside the kitchen drain. Over time, this buildup can cause bad odours, even if the sink drains properly. If the P-trap under the sink dries out, sewer gases can enter the kitchen. Running water through the drain once a week can help keep the trap sealed.
Basement Drains
Drains in the basement are not used as often as others. This allows the water in the trap to evaporate. When no water stays in a floor drain, the seal breaks. This open path allows sewer gas to move into the room.
If your basement has a sour or damp smell, the floor drain may be the reason. Check it firs,t as dry traps often cause this type of odour.
Laundry Room or Utility Area
Washing machines and utility sinks often share floor drains. If these drains are unsealed or rarely used, the smell may travel into the laundry room. In some cases the rubber hose from the washer can trap debris, which also leads to odours.
HVAC System
Sometimes your HVAC system can also pull in odours from nearby drains or plumbing lines. This can spread the smell throughout the home. A leak near ductwork or an open drain trap near the furnace can make the issue worse.
When to Take Action
Sewer gas smells strong and unpleasant. It may also affect your health if it stays in the air too long. Hidden cracks in pipes behind walls or under floors often lead to this. If no action is taken, these faults may cause serious harm to your plumbing system.
Moisture from leaking pipes can also lead to mold growth, which leads to another health risk in your home. If you notice these smells for more than 24 to 48 hours, it’s time to act. Lew Plumbing is here to help homeowners throughout Vancouver and its surrounding areas. Contact us for booking and inspection.
FAQs
How to get rid of sewer smell?
Pour warm (not boiling) water down any drains you do not use often. This helps refill dry traps and prevents gases from escaping. Clean out sink and shower drains using a cleaner to remove buildup. If the smell comes back, inspect the vent pipes and basement drains.
Can a broken sewer line cause indoor smells?
Yes, it can. A damaged or collapsed sewer pipe allows gas and waste to escape. These smells may enter your home through drains or floor cracks.
