Step 1 · Diagnose the Problem and Gather Materials

First, confirm that the problem is the diverter. Turn on the tub faucet and then pull the diverter knob to engage the shower. If water continues to flow or leak heavily from the tub spout instead of being fully redirected to the shower head, the diverter has failed. Next, gather all necessary tools and supplies for the job. You will need a new tub spout that matches your connection type (slip-on for this guide), an Allen wrench set, a thick rag or towel, and silicone caulk. Close the tub drain to prevent any small parts, like a set screw, from falling in.