The market situation and the basic characteristics of polypropylene hot-water pipe was discussed in this paper.

He found the snake curled up under the kitchen sink where the hot-water pipe fed into the faucet and dishwasher, but it was all but inanimate, as cold and slick as a garden hose left out in the frost.

But, no matter how simplistic this design is, you will still have to solder copper pipe joints if you want to tap into your existing hot water system.