Bathroom drains can start to emit unpleasant odours for a variety of reasons. This can be caused by a build-up of hair, soap scum, and other debris that accumulates over time. These substances, combined with bacteria and moisture, create the perfect environment for foul smells to thrive. Not only can these odours be off-putting, but they can also indicate a more serious underlying issue with your plumbing system.
If you’re dealing with smelly bathroom drains, don’t worry, there are several ways to fix the problem. In this comprehensive guide, we’ll discuss the steps on how to get rid of smelly drains in the bathroom and keep your bathroom smelling fresh.

Causes of Smelly Bathroom Drains
Before diving into the solutions, it’s essential to understand what causes smelly bathroom drains in the first place. The most common culprits include:
- Build-up of hair and soap scum: As mentioned earlier, hair and soap scum can accumulate in your drain over time, creating a breeding ground for bacteria. As these substances decompose, they release unpleasant odours.
- Clogged drain: A completely blocked or partially clogged drain can also cause bad smells. When debris and other materials get trapped in the pipes, they can start to rot and produce foul odours.
- Dry P-trap: The P-shaped pipe under your sink is called a p-trap for a reason. It traps water to prevent sewer gases from entering your home through the drain. If this trap dries out, it can no longer perform its function, and unpleasant odours can seep into your bathroom.
Now that we’ve identified some of the common causes let’s move on to how you can fix those smelly bathroom drains.
1) Regular Cleaning
The first and most important step in preventing smelly bathroom drains is to clean them regularly. This includes removing hair, soap scum, and other debris from the drain using a plunger or a plumbing snake. You can also use a mixture of vinegar and baking soda to break down any build-up and remove unpleasant odours.
2) Biodegradable Drain Cleaners
If regular cleaning doesn’t seem to be doing the trick, you may need a stronger solution. Biodegradable drain cleaners are an effective and environmentally friendly option for removing clogs and eliminating odours. These cleaners use natural enzymes to break down organic substances in your drain without causing any damage to your plumbing system.
3) Call a Professional
In some cases, the issue with your smelly bathroom drain may be more complex, and you may need to call in a professional plumber from Murphy Plumbing. We have the tools and expertise to diagnose and fix any underlying plumbing issues that may be causing the odours. It’s always best to consult our professional if you’re unsure of how to fix the problem or if it persists after trying other solutions.
4) Preventative Measures
Once you’ve resolved the issue with your smelly bathroom drains, it’s crucial to take preventative measures to avoid them in the future. This includes regularly cleaning and maintaining your drains and avoiding putting substances that can cause clogs, such as grease and hair, down the drain. You can also run hot water through your drains once a week to help keep them clear and smelling fresh.
In conclusion, smelly bathroom drains are a common problem that can be caused by various factors. With regular cleaning and proper maintenance, you can prevent and eliminate unpleasant odours in your bathroom. And if the issue persists or seems more complex, don’t hesitate to call a professional for assistance. By following these steps, you can ensure that your bathroom stays fresh and welcoming for you and your guests.
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