A shower diverter valve helps to reduce the space needed for a shower and tub and eliminates the need for extra pipes and plumbing work for installation. The three main types of shower diverter valves are listed below.
The shower diverter valve in a three-handle faucet system channels mixed hot and cold water from your tub faucet to the showerhead. After extended use, however, the washer on the end of the diverter valve stem becomes worn. This reduces shower pressure by allowing some water to bypass the diverter and flow into the tub. If this happens, replace the defective part; most plumbing outlets and home centers carry replacement diverter valve stems, and if you have basic do-it-yourself skills, removing the old stem and installing a new one is fairly straightforward.
A shower diverter valve enables a shower to be installed in a tub without a separate shower enclosure by using a rubber washer to cut off water supply from the tub and divert it to the shower head. There are several positions where the shower diverter valve can be placed, such as between the faucet and the spout or as a pull arm on the center of the faucet.
Many homes have a shower-tub combination in the bathroom. In the shower-tub combination, a knob is turned or a level is pulled to switch the water flow back and forth between the tub and the shower. For example, you turn the water on and it comes out of the faucet into the tub; you turn the knob or pull the lever and the water is diverted to the shower head. The shower diverter valve is part of the faucet assembly and diverts the water to the shower when engaged. This valve can malfunction for various reasons, making it difficult to take a shower.