27 January 2026

How to Fix a Toilet That Is Not Draining Properly

We’ve all been there, flushing the toilet only to watch as the water rises and drains longer than expected. You wait and wait, but it doesn’t go down as quickly as it should. 

A toilet that drains slowly isn’t just inconvenient, but it’s downright frustrating. But don’t worry, it’s not always a sign of a major plumbing issue. A slow-draining toilet can often be fixed without too much hassle.

If you’re dealing with a toilet that’s slow to drain, this blog will walk you through all the possible reasons why your toilet is draining slowly and how to fix it.

Common Causes of a Slow-Draining Toilet

A toilet that drains slowly can be caused by a variety of issues. Let’s break down the most common reasons behind it:

1. Clogged Toilet

If the toilet drains slowly, it’s often due to something being stuck in the pipe. This could be anything from excessive toilet paper to foreign objects, like wet wipes or sanitary products, that shouldn’t have been flushed.

  • Grab a Toilet Plunger: Start by using a toilet plunger to clear the clog. A flange plunger (with a rubber bell-shaped head) is most effective for toilets. You’ll want to place the plunger over the drain hole, creating a tight seal, then push and pull with steady force to dislodge the blockage. It will take a few minutes, but if the clog isn’t too deep, this should do the trick.
  • Try a Toilet Snake: If plunging doesn’t work, you can use a toilet snake (or auger). Insert the snake into the toilet drain and twist it until you feel resistance. Keep turning to break up the clog. Once you’ve done that, flush the toilet to check if the water drains properly.

2. Blocked Sewer Line

A more serious issue that can cause a toilet to drain slowly is a blockage in the sewer line. This is particularly true if you notice slow draining in multiple drains, not just the toilet.

  • Call a Plumber: Blockages in the sewer line are not something you should attempt to fix on your own. A plumber in Sydney will use a drain camera to inspect the pipes and determine the cause of the blockage.

The plumber will use a high-pressure jet to clear the pipes or replace damaged sections of the line.

3. Ventilation Blockage

Every plumbing system relies on ventilation to allow air to flow freely through the pipes and prevent vacuum pressure that could block drainage. If your toilet drains slowly, it could be due to a blocked vent.

  • Inspect the Vent: If you’re comfortable with heights and have access to the roof, inspect the vent pipe for any blockages. A buildup of leaves, debris, or even bird nests can block the vent and cause drainage issues. Clear away any obstructions, and this could solve the slow-draining toilet issue.

4. Aging or Poor-Quality Toilet

Over time, toilets can experience issues due to wear and tear. As they age, the pipes, mechanisms, and internal components can degrade, causing slow drainage and poor water flow.

  • Consider Replacement: : If your toilet is old and consistently drains slowly, it is time for a replacement. Upgrading to a modern toilet can improve drainage efficiency, prevent blockages, and ensure optimal operation.

How to Prevent Your Toilet from Draining Slowly

Once you’ve dealt with the issue causing the slow-draining toilet, it’s important to maintain your plumbing to prevent future problems. Here are a few tips:

  • Avoid flushing large amounts of toilet paper at once. Instead, use just enough to do the job, and consider using a thinner brand that dissolves quickly.
  • Only flush waste and toilet paper down the toilet. Items like wet wipes, sanitary products, and paper towels can easily clog your pipes and cause drainage problems.
  • Have a professional plumber inspect your pipes and drainage system every few years to catch potential issues early.

Conclusion

A toilet that’s not draining properly can be very annoying to deal with, but don’t worry, we’re here to help! At All Day Plumbing, our team can get your toilet back to normal in no time. We have the skills and experience to address the problem and provide you with a reliable toilet repair in Sydney.

Don’t hesitate to reach out to us. You can call us at 1300 071 280 or fill out our online form. We’re ready to help and get your toilet working properly!