I have a leaking tub/shower valve that only leaks when the diverter is set for a shower. It's a Delta 1700 series one handle tub/shower valve installed over a whirlpool with an access panel that can be removed from that front of the tub. I pulled the panel off and looked with a mirror up the valve wall and saw water leaking from the bottom of the valve. My question is this , " what type of connection is this? (i.e threaded, sweated) Does it feed the shower head?Either way I'm going to have to cut into the wall to fix behind it.. I just want to get an idea of what I'm up against. Anyone got any clues? Thanks