You can also use Moen 1225b cart will work, and is actually better. The brass cart. tend to be a real bear to get out sometimes they can seize in. Always use the tool that should come with cart. to spin cart. around before tring to pull it out or the core will come out. If the core comes out they do make a special tool to remove or try an east out like you would use for extracting a broken bolt. I'm positive the new stlye cartridge is better, I run a family owned plumbing company and never use the brass cart for the last fifteen years! Well we are packing up for the International hope this helps.
P.S. If you get the cartridge in and the hot and cold are reversed simply pull the handle, rotate the center center core 180 degrees, the center core not the whole cartridge and this will be solved. A new core will make the faucet like new.