Why can't SharkBite plumbing connectors be sold in CA and VT?
It must be the lead, because http://www.sharkbiteplumbing.com/lead-free-fittings is advertising lead free fittings and leads with this line:


  As of January 1, 2010, changes to California and Vermont laws prohibit
  selling any pipe, fitting, or fixture that is intended to dispense or
  convey drinking water and that has a weighted average lead content of
  more than 0.25% based on a wetted surface area calculation.


I would have expected another sentence in there saying "and these are lead free so it's fine" but there isn't that, just a bunch of pictures of individual fittings.