Pictured below is the drain for a tub that I need to take apart (to fish out a rubber drain stopper that fell down).
I don't understand what was done in the PVC area (or what these things are (called)) and how to undo it so that I can take it apart.
What should I loosen to undo this and in what order? It seems like PN.a and PN.b are in eachother's way and neither can be loosened.
Is it likely that there is a pipe between
PN.b that I cannot see and both of these nuts are slip fittings over that pipe? (This is a clawfoot tub to it's possible they lowered it)
CP.b slip into
CT.a and I cannot simply undo
CN.b and remove them (as it's not a union joint).
Appreciate any help.