Product review (5 stars): perfect for an ice maker
This is perfect for an ice maker.  I installed one behind my fridge.  My plumbing was CPVC, so I bought a CPVC adapter that screwed onto the threaded pipe of this box.  The whole process was quite easy for me since my fridge sits directly next to a bathroom.  It's really convenient to be able to shut your water off at the fridge if you need to disconnect it.