4 Causes Of A Smelly Toilet

Al Mclean • August 15, 2025

As the scorching Australian summer approaches, many of us are eagerly preparing for outdoor gatherings, barbecues, and pool parties. However, one aspect of preparation that often gets overlooked is gas appliance servicing for homeowners.

Have you cleaned your toilet repeatedly yet it still smells? Unfortunately, some plumbing problems result in your toilet smelling awful even if the exterior is clean.


Below are some of the most common causes of a smelly toilet. 

1. Cistern Issues

A lot of people overlook the cistern as the origin of that nasty smell. If that unpleasant smell lingers even after you clean the toilet bowl, then it may be your cistern. Lift the lid and check. If the odour is coming from the cistern, all you need to do is drain the tank, scrub it with a brush and cleaning product, then let it fill up again.

2. Toilet Trap

Ever wonder why the pipes in your toilet bowl curve? The bend in the pipes allows water to pool, which forms a physical barrier preventing sewer gases and odours from wafting into your bathroom. Try putting some water into the toilet and see if that helps stop the smell. If it does, but the smell comes back after a flush then contact your local Brighton plumber as the toilet isn’t supplying enough water to block the pipe.

3. Vent Pipes

Running from your toilet to the ceiling and typically venting via your roof, vent pipes help vent out unpleasant smells while bringing in oxygen. If you run into issues with the vent pipes, it can be nasty. Thankfully you can call us at Almac Plumbing, your reliable Hampton plumber, to fix the problem.

4. Loose Toilet Bolts or Sealant 

Broken sealant and loose toilet bolts need to be replaced to prevent sewage gases from escaping. 

Licensed Residential Plumbers for Sandringham, Brighton, Hampton and Bayside

If you are tired of the unpleasant smell that no amount of scrubbing stops contact the reliable residential plumbers at Almac Plumbing. With more than 20 years of experience, our trusted technicians can get rid of that nasty smell getting your toilet plumbing in perfect working order. Backed by a 100% satisfaction guarantee, the friendly and clean professional plumbers at Almac Plumbing are residential plumbing experts.


Servicing Brighton, Sandringham, Hampton, Bayside and surrounding areas in Melbourne with domestic plumbing and drainage solutions, gas fitting, hydronic heating and commercial plumbing, Almac Plumbing has all your home plumbing needs covered. Contact the trusted, licensed expert technicians at Almac Plumbing on 1300 125 622 for your residential plumbing needs. 

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