A sudden sewer gas smell in your Perth home or business is never pleasant and typically, there is more to it than just the odour. That rotten egg smell often indicates something more serious is happening within your plumbing system. Whether it’s coming from the bathroom, laundry, or another area, it’s important to act fast to avoid potential health risks and costly repairs.
Sewer gas is a mixture of toxic and non-toxic gases produced by decomposing organic matter in sewer systems. Its most recognisable component is hydrogen sulphide, which smells like rotten eggs.
Other gases may include methane, carbon dioxide, and ammonia just to name a few. In high concentrations, these gases can pose a serious health risk, causing symptoms such as dizziness, nausea, headaches, or even long-term organ damage.
While the obvious indicator is the unpleasant odour, there can be other signs that could mean your plumbing system has a fault:
If any of these issues are present alongside the smell, you likely have a sewer gas problem that needs immediate attention.
Several plumbing issues can cause sewer gas to leak into your property. Some of the most common include:
Water traps (or P-traps) are the curved pipes under sinks, showers, or floor drains. They hold a small amount of water that blocks sewer gases from coming back up through the drain pipes. If the trap dries out, gases can escape more easily.
Loose plumbing connections, cracked drain lines, or a faulty wax ring under a toilet can allow gas to escape from the sewer line into your home. This is especially common with DIY or old plumbing systems.
A clogged drain or sewer line issue can cause pressure to build up in the system, forcing gas through any available gap. This can also lead to sewage backups or gurgling noises from your pipes.
Sewer vents allow fresh air into the system and release gas outside the home. If these are blocked by debris or even corrosion, gas may be forced back inside.
Clean out caps provide access to the sewer line for cleaning and inspections. If a cap is missing or cracked, gas can easily leak into your building, especially in basements, laundries or utility areas.
It’s important to differentiate between a sewer gas smell and a natural gas leak. While both may smell like rotten eggs, natural gas usually has a more pungent, chemically added odour. Natural gas is highly flammable, so if you suspect a natural gas leak, evacuate immediately and call emergency services or your gas provider.
Low-level exposure to sewer gases may cause:
Higher concentrations can cause more serious symptoms/effects such as:
Children, the elderly, and people with respiratory issues are particularly at risk. If anyone in your property is experiencing these symptoms and you smell sewer gas, seek immediate medical attention.
If you notice a sewer odour, take the following steps:
Open windows and doors to allow fresh air in and reduce the concentration of harmful gases indoors.
Pour water down all floor drains, sinks, and toilets. If the smell goes away, you may have had a dry trap.
Check around toilets, sinks and any exposed plumbing fixtures for signs of damage, loose connections or standing water.
If a drain isn’t used regularly, consider sealing it with a drain cap or cover to prevent gases from escaping.
If you suspect a high concentration of methane gas, avoid using open flames or operating electrical equipment until the area is safe.
If the smell persists or you suspect deeper sewer line or vent pipe issues, contact an experienced plumber in Perth. They’ll conduct a professional inspection and may use tools like a smoke test or drain snake to pinpoint the issue and provide a permanent solution.
Once resolved, you can take steps to reduce the risk of future sewer gas leaks:
If you’re smelling sewer gas in your Perth property, don’t wait. That foul odour could be a sign of a much bigger problem in your plumbing system, putting your health at risk.
Whether you’re dealing with a sewer gas smell in the bathroom, a clogged drain, or suspect a leak in your sewer line, Tunnel Vision is here to help.
Rather than masking the smell, we fix the root cause so it doesn’t come back.
Call Tunnel Vision on 1800 631 799 or book online!
Our licensed plumbers are equipped with:
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Whether you require emergency response, scheduled maintenance, pipeline inspections or trenchless rehabilitation services, the Tunnel Vision team is ready to assist. Contact us today to discuss your project, request a quote or speak with our experienced team about the right solution for your site or property.
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