Insert a tub-and-shower valve socket wrench on the faucet stem and turn it counterclockwise. There are several types of shower valves and handles. Additionally, how do you fix a shower diverter valve? This will make them look new again. Double-check the valve size and model to make sure it matches your old cartridge. Inspect the tip of the valve stem. Step 2 - Drain Water in Lines. Take Out the Trim and Sleeve. If you’re unsure how to do this, read the owner’s manual. You can then proceed with removing your valve. Step 4 - Remove Cartridge. Although it looks complicated, you can repair a leaking three-handle tub and shower faucet in just a few steps. While needlenose pliers can be used for this step, it may be easier with thicker pliers. Answered by superengine: I just had bathroom tub valve replacement from Simply Green Plumbing from Los Gatos, total was about $885, I asked for the break-down charges, but they didn't give me, it was very pricy and overpriced! Extract the Cartridge. Pop the handle's plastic button off with a blunt knife or ruler. If applicable, use a flat-blade screwdriver to remove the pin from the adaptor. As a professional plumber can install one in less than two hours, the replacement cost is not particularly expensive. The hole should be small enough that you can still cover it with the handle and trim plate later on. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/d2\/Replace-a-Shower-Valve-Step-1.jpg\/v4-460px-Replace-a-Shower-Valve-Step-1.jpg","bigUrl":"\/images\/thumb\/d\/d2\/Replace-a-Shower-Valve-Step-1.jpg\/aid9752157-v4-728px-Replace-a-Shower-Valve-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"