
Flushing inappropriate items down the toilet can lead to significant plumbing problems, from clogs to costly repairs. To maintain a healthy plumbing system, it’s essential to know what should never go down the toilet.
Table of Contents
Here’s a comprehensive guide to 17 items to avoid flushing:
1. Wipes
Even those labeled “flushable” can cause blockages. They don’t break down like toilet paper and can accumulate in your pipes.
Wet wipes are one of the nastiest enemies in modern sanitary systems and since the start of this pandemic, the use of disinfectant wipes caused widespread drainage problems.
Though the packaging for this sanitary product may claim these to be flushable, the truth is totally the opposite, since any type of wipes; being disinfectant, wet or for babies, do not disintegrate like toilet paper.
Hence, they are accountable for causing half of the world-wide sewer blockages and can lead to very high repair costs.
2. Feminine Hygiene Products

Items like pads and tampons are designed to absorb moisture, making them prone to clogging the plumbing system.
Tampons, sanitary pads, and other sanitary products are designed to absorb liquid and, in some cases, expand to several times larger than their original size.
However, for instance, tampons say they’re flushable right on the box, yet, once you realize that tampons, maxi pads, wipes, and other “flush-friendly” products can destroy your sewage system, you’ll think twice about ever flushing them again. To be safe, always dispose of sanitary products in the trash.
3. Condoms
Flushing condoms can lead to clogs. They’re made of materials that don’t decompose easily.
You might not realise it, but even the occasional condom flush can be very destructive to the environment. The toilets work under the same principles, whether you’re in a hotel or your own house.
So, even if you’re in a hotel, you still need to be responsible and not throw your used condoms down the toilet.
4. Cotton Balls and Swabs

Although cotton balls, rounds, and swabs might seem small enough to flush, they can cause big problems inside your drain pipes.
Many might reason that for example, tiny balls of cotton wool would just get soggy and eventually break down in the pipes, but they don’t. They can gather in bends of drainpipes and cause serious blockages.
5. Diapers

Both disposable and cloth diapers are too bulky and can quickly lead to severe clogs.
6. Dental Floss

Even dental floss can cause clogging to your drainpipes hence flushing this cord of thin filaments can cause significant damage both to the sewage network and the environment.
Dental floss does not break down easily in water and can build up over time if flushed. If the floss is flushed down, it can wrap around other items flushed after it, creating even larger clumps that will eventually clog sewers and pipes.
Moreover, it can also wrap around parts of your septic system and burn out pumping equipment. Therefore, after practicing good dental hygiene, toss your floss in the trash
7. Hair

Like dental floss, sending hair down the drain can cause larger problems later. Hair forms a sort of net when you flush it down the drain and gets easily trapped in your drainage pipes. Furthermore, hair never liquefies so it’s an even greater risk for blockages in your sewer system.
8. Food Scraps
Leftover food doesn’t break down properly in the plumbing and can lead to severe clogs.
Types of Food That Should Not Be Flushed
While avoiding flushing any food down the toilet is important, some items are particularly problematic. These include:
- Starchy foods: Pasta, rice, and potatoes tend to absorb water and expand. When flushed down the drain, they can swell and create obstructions, impeding the proper functioning of your plumbing system. Discarding these food items in the trash rather than disposing of them through the sink is advisable.
- Grease, fats, and oils: These substances, when poured down the drain, can solidify and accumulate over time, gradually narrowing the pipe’s diameter and leading to blockages. It is important to dispose of these substances properly to prevent plumbing issues.
Fats can solidify in pipes, causing blockages that are hard to clear.
As a rule, you shouldn’t flush food down the toilet at all, and especially when it comes to fats, oils, and grease as they can be particularly problematic for drains.
Therefore, just as you shouldn’t put cooking grease down the drain, you should never flush grease. When grease cools, it congeals which makes it thicker and leads to the risk of clogging your drainage pipes.
So, after cooking, allow fats, oils, and grease to cool completely and solidify before throwing the remains in the trash.
- Fibrous foods: Foods with fibrous components, such as fruit peels, vegetable scraps, and coffee grounds, can intertwine with other debris in your pipes, forming stubborn clogs that are difficult to remove. Avoid rinsing these items down the drain to maintain a smooth water flow.
9. Medications

Flushing medications can contaminate water supplies. They should be disposed of through proper medication take-back programs.
Many people might think that you are doing the right and the safest thing by flushing medications down the toilet, but you aren’t.
If you have old pills that you need to get rid of, don’t flush the pills — toilet water doesn’t break them down properly, meaning the medication gets into the water and can cause toxic environmental effects.
These drugs can destroy important bacteria which is necessary for the wastewater treatment process, contaminate groundwater and also impact the environment. Thus, if you want to dispose of old medications, bring out of date/unused medicine to your local pharmacy for safe removal.
10. Paper Towels

These are thicker than toilet paper and don’t break down as easily, leading to potential clogs.
It’s true, paper towels might look and feel like toilet paper, but they should never go down the toilet. What makes paper towels so effectual at cleaning spills is the same reason they will cause glitches to your sewer system, if you had to dispose them in your toilet.
Moreover, what makes them more of a cause of clogs is the fact that they are resistant to dissolving in water.
11. Tissues

Like paper towels, tissues can create blockages since they don’t dissolve as quickly as toilet paper.
12. Chewing Gums
As a cohesive substance, the gum is a bit like glue. And it gets stuck in the pipes, blocking the natural flow of wastewater. The gum goes in the bin.
13. Cat Litter

Even if labeled “flushable,” cat litter can cause serious plumbing issues as it clumps and expands in water.
14. Cigarette Butts
These are non-biodegradable and can contribute to clogs while also polluting water systems.
Cigarette butts are toxic, and they are also another waste item that can introduce potentially harmful chemicals into the water system.
Obviously, we surely don’t want that in our water stream! Cigarette butts don’t always go down the drain after being flushed. It’s important that after you have extinguished your cigarette, dispose of it in the trash.
15. Small Toys
Kids’ toys can easily get stuck in the plumbing and create significant blockages.
16. Anything Plastic or Non-Biodegradable
Items like wrappers or plastic bags don’t break down and can cause severe plumbing issues.
17. Bleach and Other Chemicals
Flushing bleach can be corrosive, damaging pipes and potentially reacting with other substances to release toxic fumes.
Conclusion:
To keep your plumbing in good shape, remember to dispose of these items in the trash instead of flushing them. Being mindful of what goes down the toilet can save you from costly repairs and keep your plumbing system running smoothly.
Whenever you are flushing any of the items mentioned in this article down a toilet, you’re not only damaging the sewer system but also impeding the proper treatment of our wastewater and therefore contributing to environmental pollution.
Always keep in mind to protect your drainage system, our sewer networks, our wastewater treatment plants, and ultimately our environment.
If you are facing clogs due to the disposal of these items, be sure to contact Direct Plumber SG to resolve your plumbing issues at an affordable price.

