So far I have not run into pex but have seen it installed. I know that sooner than later I'll be called to install or repair something with PEX. I really need to know ALL about the tools required... what I need to buy to be set up for working with pex and installing it. In the house I'm building I plan to use LOTS of PEX... so that will be a very good education for me. You guys know of a site with an online manual or really good educational materials? I just need some really go info. From what I've read it seems that some think you have to have different tools for every different manufacturer...from what I see these tools ain't cheap ... that can be good for plumbers...keeps the DIY's out of the business .... but also, it appears that with PEX there is much less reason to call a plumber for repairs.