So the company I work for has been using this pipe for approximately a year now, of which I have garned some good experience using it. It's a German made Polypropolene called Aquatherm, also known as fusiotherm. It is joined by a fusion Iron that is very similar to the ones geo guys use for HDPE (High Density Polyethylene).

I hope you guys can see this thread which I started some monthes back about this product: http://www.plumbingzone.com/f21/future-fusion-1547/