The 6 things you should never put down your drain are wet wipes, grease and oil, food scraps, sanitary products, paper towels, and foreign objects, as these materials do not break down properly and can build up inside pipes over time, leading to restricted flow, recurring blockages, and costly plumbing issues if not addressed early.
Key takeaways
- Wet wipes do not break down and are a leading cause of blockages
- Grease and oil solidify inside pipes and restrict flow
- Food scraps can build up and cause recurring issues
- Sanitary items and paper products clog drains quickly
- Foreign objects can cause immediate and severe blockages
- Most blocked drains are preventable with better habits
Why what you put down your drain matters
What you put down your drain directly affects how well your plumbing system performs over time.
Drains are designed to carry:
- water
- human waste
- small amounts of toilet paper
Anything outside of this can start to create problems.
Most issues do not happen instantly. They build slowly. A bit of grease here, a wipe there, some food scraps over time. Before you know it, there is enough build-up inside the pipe to restrict flow.
This is why so many blocked drains seem to “come out of nowhere” when in reality they have been developing for months.
Across the Mornington Peninsula, this is one of the most common causes of callouts. Not broken pipes. Not major failures. Just everyday habits that add up over time.
1. Wet wipes and “flushable” products
*Real Photo*
Wet wipes are one of the biggest causes of blocked drains.
Even products labelled as flushable:
- do not break down like toilet paper
- stay intact in the pipe
- get caught on joins, roots, or imperfections
Once one wipe gets caught, it becomes a net. Other debris starts catching on it, and the blockage builds from there.
In real-world plumbing, these products cause constant issues. It does not matter what the packaging says. They simply do not break down fast enough to move safely through the system.
This is especially a problem in older Mornington Peninsula homes where:
- pipes may not be perfectly aligned
- flow may not be as strong
- there may already be minor imperfections in the line
The safest approach is simple. If it is not toilet paper, do not flush it.
2. Grease, oil and fat
*Real photo*
Grease and oil are one of the most underestimated causes of blocked drains.
When hot grease is poured down the sink, it flows easily at first. It looks harmless. But once it cools, it solidifies and sticks to the inside of the pipe.
Over time, this creates:
- a thick coating on pipe walls
- a sticky surface for debris to attach
- a gradual narrowing of the pipe
Then things like food particles or soap residue start catching, and the blockage builds layer by layer.
This is one of the main reasons kitchen drains block.
On the Mornington Peninsula, where some homes have longer pipe runs or older systems, this build-up can become a serious issue much faster than people expect.
Best practice is simple:
- let grease cool
- scrape it into the bin
- never pour it down the sink
3. Food scraps and kitchen waste
Food scraps should not be going down your drain, even in small amounts.
Common offenders include:
- coffee grounds
- rice
- pasta
- vegetable peelings
- eggshells
These materials behave differently once inside the pipe.
For example:
- rice and pasta expand with water
- coffee grounds clump together
- fibrous materials can tangle and catch
Even if they make it through initially, they often settle in low points or rough sections of pipe and start building up.
Over time, this creates recurring blockages that seem to “keep coming back”.
If you do not have a proper food waste system designed for it, the bin is always the better option.
4. Sanitary products and personal hygiene items
Sanitary products are designed to absorb liquid and expand. That makes them one of the worst things you can put into a plumbing system.
This includes:
- tampons
- sanitary pads
- cotton buds
- dental floss
- wipes of any kind
Once inside the pipe, these items:
- swell
- get stuck
- catch other debris
They do not break down, and they can cause severe blockages very quickly.
These types of blockages are often harder to clear because they can become tightly lodged in the system.
In many cases, they require proper equipment to remove rather than a simple flush or plunge.
5. Paper towels and thick paper products
Paper towels are often mistaken as being similar to toilet paper, but they behave very differently.
Toilet paper is designed to break down quickly in water.
Paper towels:
- are stronger
- hold their structure
- do not dissolve easily
When flushed or washed into the system, they tend to:
- clump together
- get stuck in the pipe
- contribute to blockages
Even small amounts can cause issues over time, especially in older systems.
Anything thicker than toilet paper should always go in the bin.
6. Foreign objects and accidental items
Foreign objects are a common cause of sudden and severe blockages.
These are items that should never have gone into the system in the first place, such as:
- packaging
- plastic items
- toys
- excessive amounts of toilet paper
These items can:
- become lodged in the pipe
- completely block flow
- cause immediate drainage failure
Unlike build-up blockages, these tend to happen quickly and often require professional removal.
In some cases, they can even damage the pipe depending on how and where they get stuck.
Signs your drain may already be affected
Blocked drains usually give warning signs before they fully block.
Common early indicators include:
- slow draining water
- gurgling or bubbling sounds
- bad smells from drains
- water backing up
- recurring minor blockages
These signs are telling you that something is building up inside the pipe.
The earlier you act, the easier and cheaper it is to fix.
How to prevent blocked drains in your home
Preventing blocked drains is mostly about awareness and simple habits.
Best practices include:
- only flushing toilet paper and waste
- keeping wipes and hygiene products out of the system
- disposing of grease and oil in the bin
- avoiding putting food scraps down the sink
- using drain strainers where possible
These small changes can make a big difference over time.
Most major blockages we see could have been avoided with better day-to-day habits.
When to call a plumber for a blocked drain
You should call a plumber for a blocked drain when water is draining slowly, backing up, making gurgling sounds, or when multiple fixtures are affected, as these are signs the blockage is beyond a simple fix and likely located deeper in the system.
If your drains are not clearing properly or the problem keeps coming back, it is usually a sign that there is an underlying issue such as build-up, tree roots, or pipe damage. In some cases, what starts as a slow drain can quickly turn into water backing up into sinks, showers, or toilets, which can create a much bigger and more urgent problem.
Ignoring these signs often allows the blockage to worsen over time, making it harder to clear and more expensive to fix. Having a plumber assess the issue early allows the cause to be properly identified and resolved before it leads to more serious damage. place.
Final thoughts on 6 things you should never put down your drain
Most blocked drains are not caused by major failures. They are caused by everyday habits that build up over time.
Wet wipes, grease, food waste, and other materials may seem harmless in the moment, but they are some of the most common causes of plumbing issues.
Being mindful of what goes down your drain and acting early when signs appear can help you avoid unnecessary stress, damage, and repair costs.
