Why Install Test Plugs in Your Pipes?

There are times when you might need to run checks on your pipes and their contents. While you can often use gauges or thermometers to do this, test plugs can be a better solution. How do test plugs work and why should you use them? How Do Pipe Test Plugs Work? Test plugs are small plugs that are inserted into parts of a pipe. You screw the casing into a hole in a key area, then you fit its cap to seal the plug.