Repairing A Tub Diverter Valve
Removd the handle and escutcheon cap. Shut off the water supply. Pry the cap off the diverter handle. Remove the screw and slide off the handle. You may have to unscrew the eschutcheon to remove it. If so, wrap the jaws of the plies with masking tape.
Disconnect the bonnet nut. Use a shower stem socket set to remove the bonnet nut and stem. If the handle keeps hitting the tub or another faucet, put a stem socket over the one you are using as an extension.
Unscrew the stem from the bonnet nut. Hold the bonnet nut with one hand. Use your other hand to remove the stem from the bonnet nut with water-pump pliers. Inspect the threads of the stem form damage. if there is evidence of damage. If there is evidence of damaged threads, replace the stem. Check the valve seat with a flashlight to make sure it is fine. It may need resurfacing or replacement.
Remove the bib screw. Clean mineral deposits on the stem with a white vinegar solution, or buy a solution to dissolve mineral deposits at your local home center. A toothbrush easily removes deposits.
Replace the old washer. Seat the new washer in the stem. Apply silicone grease to the washer so it seats properly. Replace the bib screw with a new one. Reassemble the faucet, sealing the escutcheon in place with a bead of plumber's putty. Turn on the water and check for any leak.
