If you have a sewer connection, you might not think about what you flush down the pipes all that much. After all, everything is going to the sewage treatment plant and will be handled there, right? However, there really are some things that shouldn't get flushed down your pipes no matter what.
There are wipes that people are using when they are in the bathroom. The wipes say that they are flushable. However, they really aren't. The reason for this is that they don't break down like toilet paper does. So instead of breaking down to a form that is easy to pass along pipes, the wipes all clump together and can block the sewer lines. The big clump can cause even more things to get caught in the pipes. Eventually, that will require that someone from the sewer company go clean out the pipes.
When you have a cat, you may feel the urge to just flush the cat litter down the toilet, especially if it's a clumping cat litter. You're flushing waste down a system that is designed to handle waste. However, if you are flushing cat litter that is designed to clump in the presence of liquid down into a system where it will encounter a lot of liquid, you are going to end up with all kinds of clogs and blockages. They may not happen in your home's waste system, but it can happen in the pipes that run from your home to the sewer collection pipes or in the larger pipes.
For years, people were told to flush unused medications down their toilet. It was an easy way to keep them out of the hands of children or anyone who shouldn't have those medications. There is one big problem with that. All those medications end up dissolving in the sewer system and at the sewage treatment plants. The sewer treatment plants can't really get those medications out, so there are actually traces of many medications that are found in various water sources. If you have medications that you need to get rid of, there are some good ways to do it. One is to check with your local police department; they often have collection boxes for old medications and they will dispose of them safely. Another way is to dump the medications in with the cat litter after you have changed the cat boxes.
These are things that you should never flush down your sewer pipes, no matter what.