1. Take out the handles.
You may need a handle puller like this - https://www.amazon.com/dp/B0754WC9RF?ref=ppx_yo2ov_dt_b_fed_asin_title
2. Unscrew the protective sleeves
3. Shut off water and take out the cardridges using shower socket wrenches
Socket wrenches - https://www.amazon.com/dp/B09CYV2L3X/ref=sspa_dk_detail_3?pd_rd_i=B09CYV2L3X&pd_rd_w=J2wvm&content-id=amzn1.sym.8c2f9165-8e93-42a1-8313-73d3809141a2&pf_rd_p=8c2f9165-8e93-42a1-8313-73d3809141a2&pf_rd_r=YWPTEGF6K1952RQR0NRY&pd_rd_wg=rkO41&pd_rd_r=62b5fe0d-01b9-44f8-891c-9f797877c8b0&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWw&th=1
