[Shop-talk] polybutylene piping

[Nolan]

> Thanks!  Are PEX and PB fittings interchangeable then?

They can be.  Depends on the maker of the fittings.

Many more things interchange unofficially, if you're handy and are willing 
to accept the risk.  Just as there's nothing wrong with a splice made from 
two hose clamps and a bicycle innertube, as long as you understand what 
you've done and it's limitations.