GE Fridge water filter supply line replacement

Was having my driveway redone and the contractor dug up a pipe about 4 inchs down. Luckily he did not break the pipe but i do see a bit of a dent. I called PGE and they came out and confirmed it is not a gas pipe. My water line seems to match the path of this pipe but the contractor and PGE person say that it doesn't look like a water pipe as water pipes are cooper or metal. This pipe if you feel it feels like plastic, not very strong. I'm thinking it's a water pipe just because it lines up correctly from the water meter from the street. The color is grey and doesn't feel like metal. It feels more like electrical piping but I live in an old neighborhood and the electrical comes thru the outside poles and on the roof of the house. Can anyone help me ID this pipe? Attached picture.[ATTACH]66685[/ATTACH]

Hello, I'm shopping for a couple new tub/shower faucets, as we have the old two handle faucets in both bathrooms and both sets are pretty well shot. I was looking at Delta, and just trying to get more information on what pressure balanced vs thermostatic (Delta's TempAssure) valves are, since they are both available as single handle faucets (a volume control and a temp control, both on a single faucet) We have 4 kids, so the risk of a toilet flushed while showering in the morning is reasonable - which is what I understand the pressure balancing valve will prevent scalding. What's the thermostatic valve do? Is it worth the extra money? Here's one for example: [url]http://www.amazon.com/T17T478-Leland-Tempassure-Shower-Chrome/dp/B001AHZRZK/ref=sr_1_15?ie=UTF8&qid=1464730682&sr=8-15&keywords=delta+tempassure[/url]