Valve cartridge replacement Step 1 Remove handle Carefully pry loose button plug and remove Phillips head screw. Step 2 Remove collar plug button Remove collar by turning counter av clockwise. screw Note: Ensure not to use any fool that could scratch finish without taking protective measures. Step 3 Remove cartridge Using a wrench, turn hex nut on cartridge counter clockwise. spindle OFF. = hot = ow Note: Ensure valve assembly under cold = cow sink doesn’t rotate cartridge — while turning nut.