
Kinda hard to tell in the photo (bigger here: https://i.imgur.com/r2zbhk1.jpg) but there used to be an eyeball jet that broke off and took the outside threading with it.

Bought a replacement like the one above, but there's no thread left to attach to—inside or out.
Can i get something to insert into the existing pipe to screw onto? Preferably without having to drain...
I'm hoping there's SOMETHING I can do, as it’s really affecting the pressure.
Thank you!