We have bought a new house and need to address a problem with our tub/shower... for reasons not known to us, the former owners took the shower/tub handle and all its components with them. Through a reasonable amount of research, I have not been able to identify what I need in order install a new valve/cartridge/handle/etc. I am attaching a picture so you can see what I am dealing with. The start of the confusion for me is the three ports in the housing. Almost everything I can find only has two ports. Also, I don't know if you can tell in the picture or not, but the two lines on the sides heading downward toward the tub have been cut and capped. The only thing I can find as far as an identifying mark on the rest of the fixtures is a Kohler "K" on the tub faceplate... but I guess that doesn't necessarily mean the handle is the same. All that being said I am feeling at a loss as to what to do next. Do I just need to cut out the old housing, install a new one and start over or can somebody tell me what I am looking at? I would sure appreciate any ideas! Thanks so much for your help!