1. Tissues and Paper Towels
While they may seem a little like toilet paper, they are not. The materials used to make tissues, paper towels and similar products do not dissolve easily and are far more likely to clog your toilet, as well as cause problems for your septic tank or at your water treatment facility.
2. Cat Litter
Even if your cat litter says that it is 'flushable,' don't flush it. All cat litter is bad for your toilet. It lingers in your pipes, refuses to dissolve easily and interacts poorly with your sewer system. If the temptation to use the toilet is too much for a family member in charge of cleaning litter, then put a box of disposable plastic bags or similar poop-scooping solutions by the litter box so that it's less of an issue.
3. Disposable Diapers
Yes, disposable diapers tend to get covered in waste. Unfortunately, toilets were not made for any kind of disposable diaper: Trying to flush these diapers is an incredibly common cause of serious pipe clogs that need professional attention. Avoid this problem, and provide another option for dealing with diapers.
While the toilet is frequently a handy option to get rid of tampons and other feminine hygiene products, it's also a bad idea. Tampons can easily create clogs deep in pipes and should never be flushed.
Condoms are another case where convenience shouldn't trump toilet care. Throw them in the trash instead of flushing: Both condom materials (typically latex) and associated lubricants are bad for your plumbing.
6. Anything Made of Cotton
This includes cotton swabs, cotton balls, Q-tips, and any other associated product. Cotton is excellent at absorbing water, but it doesn't break down easily. The combination is a dire one for your plumbing.
7. Any Type of Plastic
It doesn't matter if it's packaging plastic or a Band-Aid, you can't flush plastics down a toilet. Plastic doesn't dissolve and can cause many problems in your pipes – if they get that far after a toilet flush.
8. Dental Floss
Yes, even small items like dental floss can cause trouble for your toilet. It's stringy, doesn't dissolve and can bundle around other objects to form larger clogs.
Any type of food is off limits, no matter how soft it may be. The same is true of any leftover pieces, shells, bones or grounds that you want to get rid of. These belong in neither your pipes nor your garbage disposal. Throw them in the trash or compost.
Water does nothing to get rid of gum, so it tends to stick around – literally. You don't want it in your pipes!
If you're fishing hairballs from your sink or tub, don't dump them in the toilet: That's just moving the clog from one part of your plumbing to another. Throw it away instead.
TV makes flushing pills look dramatic and effective, but it's a horrible idea. If you have pills past expiration or just don't want them in your house, find a local medicine take-back program or grind them up and throw them away on trash day. Otherwise, those potent chemicals will get into sewer systems and even groundwater, where they can do untold damage.