How to Repair a Delta Diverter Valve

Turn the water supply off to the shower.

Insert an Allen wrench into the setscrew in the diverter handle bottom on a paddle type knob. Turn the Allen wrench counterclockwise to loosen it. For a round knob-style diverter, pry the knob cap off with a screwdriver and loosen the screw underneath in a counterclockwise direction. Pull the paddle knob or round knob off the diverter.

Place a pair of adjustable pliers on the brass bonnet. Turn the pliers counterclockwise to loosen the bonnet. Pull the bonnet straight out and off the valve. Unscrew and remove the plastic sleeve in a counterclockwise direction.

Pull the cartridge out of the cartridge body with adjustable pliers while twisting it side to side.

Align the bottom pin of a new cartridge with the hole in the cartridge body to insert the cartridge.

Place the plastic sleeve on the cartridge and tighten it clockwise with adjustable pliers. Repeat this process to replace the brass bonnet.

Place the knob on the diverter and tighten the screw in the center on a round knob or the setscrew on the bottom of a paddle-type knob.

Turn the water supply to the shower on.