Product review (1 stars): Don't buy this unless you want to pull your hair out
Sharkbite fittings work pretty well for the most part, but I don't recommend this box.

In most configurations, the Sharkbite valves have to be removed from the new wall box for proper final placement. They were too tightly attached on the assembly line, and they won't come apart. It's like somebody welded them shut. Sharkbite customer service was of NO help, and denied ever hearing of this problem, even though I found others online who had the same problem, and had called Sharkbite.  They didn't offier to replace my item: They basically told me TOO BAD.

In desperation, I tested this on 6 boxes at 4 different stores, and all had the same problem. I had help from many employees at both Home Depot and Lowes, and nobody could get it apart. At Sharkbite, somebody actually suggested that I put a screwdriver into the Sharkbite fitting for leverage. WHAT?

If you have already bought this, and you're desperate, here's what you do:

Take a saw and saw a channel in the plastic box in front of the valves. Pull the valves out. Now you can attach the fitting onto the pipe separately from the box. At least you'll be able to wash.

Later, you can probably nevigate the sawn box behind the valves and attach the box to the wall. The face plate covers much of the damage. Even better, you might want to make or buy a box that is nicer than this POS piece of plastic garbage.

I just used the supplied box, it looks ratty but I'm sick of this project.

This mess took me 2 days and 2 1/2 hours driven.

Edit: I went to the store today where I bought one of these boxes, and returned it as defective. The defective item is back on the shelf.