Polybutylene is a type of plastic used to make pipes traditionally. It is an inexpensive material that is easy to install and has started to replace copper pipes.
This piping system used for underground water supply is ideal as it also became the main piping system for indoor water distribution lines and built more than 10 million houses during that time. That equates to one in four to five households. You can find poly- b pipe replacement services via johngplumbing.com/plumbing-services/poly-b-pipe-replacement/.
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It's good if someone comes and checks if you have this type of pipe. Those skilled in the art can tell that external polybutylene is used because it will be blue-gray or black in color. This is where it gets complicated because a black skirt is different from polybutylene.
This type of pipe is 1 inch in diameter and runs through your home to the basement floor or walls. Most often, it enters your home near the boiler. The pipe is connected to your water meter so you can tell what type it is.
The interior of your house is used around the boiler. If you can see the connecting pipe, you and your plumber can tell what type of pipe it is.
This will be visible on the unfinished basement ceiling and beyond the walls where the sink and toilet are attached.There are things called "outs" where the pipe comes out of the wall to which the pipe and fittings are connected.