The P-trap serves an essential purpose in your plumbing system. If you aren’t aware of what a p-trap is, it is the pipe that is shaped somewhat like a “P” that can be found under your sink. It is set up in a certain way to prevent sewer gasses from entering your home. Sewer gasses are formed by all the waste that is flushed down the toilet and your sinks, and it doesn’t just smell bad, it is bad for your health as well. So to avoid having health issues due to sewer gas, anything that is connected to your sewer line will have a p-trap. It is important that it is installed correctly since the water needs to cover the pipe completely to be effective. If done right it should allow water and waste to flow freely while nothing makes it back in. Next time you look under your sink, you should appreciate the important role that a p-trap plays in keeping you healthy and your home smelling nice.