This is a set of high poly PVC pipes that you can make endless structures with. If you want to render the waterworks in your house or maybe some DIY structures, it doesn't matter. As long as you keep the objects in the same scale ratio, they will fit perfectly at any time. You can even use them for water simulations. With some skills on creating materials, you can use them for scaffolds too.
As you can tell, the options are endless because PVC piping is very modular.