PEX Plumbing

I need to do some plumbing on my '02 2619. Piping looks like PEX to me. Just wondering if anyone knows the pipe size? Its either 1/2" or 5/8", just not sure which?

FYI, for anyone wanting to do some plumbing on your TM, the PEX crimping tool (crimps a copper fitting around the pipe securing it to the fitting) they get in your pocket if you want to buy the tool ($119 at Home Depot) or the best option is they rent them for about $7 per day. But make sure you call as not all Home Depot's have tool rental facilities.

Thanks,

Jeff