Shower arm issue

[hayley3]

I had a handyman install a new shower. The pipe you thread the shower arm onto is recessed inside the wall. So to screw on the shower arm, I push the shower arm inside the drywall. My issue is, if it's leaking, how would I know since the joint between the two pieces is inside the wall?
Is there an adapter to put on to make it come out of the wall a couple inches, so I can screw on the shower arm?
If not, is there a way to fix it?

Thanks,
Cheryl

 

[Terry]

Normally you have an escutcheon that slides back which may allow you to see. However, nobody really does that. Three wraps with tape and thread it in.
I like to thread the head on first to allow me more leverage when I hand spin it in. After it's centered, then I make sure the shower head is firm to the end of the threads. The threads in the wall I know are tight.