The single handle bathtub fixture broke off yesterday. I pulled the cover off and managed to extract (it was pretty difficult!) the broken cartridge. I got a new assembly from HD and thought it would be pretty easy to install. However, I can't get the new moen cartridge in all of the way! Am i missing something? The old cartridge was numbered #96909 (or 60696). I can't find a direct replacement, but that wouldn't help because the handle itself broke too.
Also, would it be easier to just go with another brand? Will they work with the plumbing fixture pictured below? In the pic below, the new cartridge is in (but not all of the way).
Moen replacement 1222 for the Posi-Temp Shower Valve