How do you remove a Delta bathtub faucet cartridge?

I have removed the clear acrylic knob/handle but now do not know how to remove the cartridge. I have removed single stems either hot or cold before but not a stem that controlled both hot and cold. Some articles reference the need of a cartridge puller but they do not go into any greater detail.

Yes, it is by the way a scald guard faucet.

Guy,
I'm honest with you here.
You can easily twist the cartridge body. So be careful.

I go on such calls several times a year where the homeowner starts to unscrew the bonnet and twist the whole thing.
Delta does not have a good design on it and it's weak.

I suggest you get a plumber and watch him do it so you can the next time.

Now if you are talking about the scald gard faucets they are ok. Just pull the chrome cover off, unscrew the chrome retaining ring and pull the cartridge straight out.

The older models , get a plumber.

remove handle, unscrew nut that keeps cartridge in, pull cartridge out w/ pliers or put handle back on w/ screw and pull

Is the water off? There will be a knurled, half ball-shaped (or dome), unscrew that and under that will be a slim ring with two notches facing you. Unscrew that and voila, the ball with the handle (the operator) will come out. REMEMBER the order of assembly because things that come out must go back in an orderly fashion. The torque on the ring at reassembly is pretty important.

http://www.deltafaucet.com/wps/portal/de...