Originally Posted by chuck
its all "qest pex"...don't like the looks of those, they're expensive, bulky, and it says right on the packages "not for use behind walls". which I can only interpret as "not very reliable".
This is easy to mis-construe. Plumbing codes do not permit threaded connectors behind walls. This includes Flair-it fittings as well - or even brass. As it happens, no mid bath coach requires plumbing connectors in sealed areas. Hard to reach, hard to see areas, yes, but not permanently sealed.
In a tight place you may find the Qest plastic fittings easier to install than Flair-it, but I much prefer Flair-it overall.