Did you pull out both cartridges? If memory serves me right they are 2 different styles. The 1225B goes in the bottom one. When you were trying to get water, where was it coming from? The upper cartridge is the diverter. Try turning that 1 way or the other. The 2 "Screw" type items are indeed shut offs for the valve so you can isolate it from the rest of the plumbing supply and the wife/girlfriend can still do dishes or laundry!!! Make sure they are both turned out(Counter-clockwise) when testing. The larger diameter item is the pressure balancing spool. Did you remove that before soldering? Good luck. BTW, Moen will probably be open by the time you finished the loops for body sprays if you are going that route with the transfer valve. Lots of fittings & small pieces of copper. Good Luck - You'll enjoy the end results.