Associated on/off valve for this

I've been advised by a plumber that in order to fix a couple of issues I have to purchase a new thermostatic cartridge (to fix poor temperature modulation) and also the on/off valve (the current system has a slow drip out of the shower head). I've figured out that the CP0000250 is the correct cartridge but am unsure what I need to get for the on/off valve. Attached is an image, the on off values are at the top and bottom and the cartridge is in the middle. Any help would be gratefully appreciated!
Asked 9 years ago by Anonymous

www.showerdoc.com/crosswater-flow-3-4-valve-aq8083


This is the replacement for the flow valve that you have.

Answered 9 years ago by Anonymous

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