Water flows directly through the faucet and into the bathtub when the diverter valve is open. Two-valve shower diverter: This type of diverter may be located in the center of a single-handle faucet or between the two handles of a two-tap faucet. A common type of shower diverter valve attaches to a rod on the tub spout and may also be called a "liftgate." They are composed of three pieces: a plastic gate that physically blocks the water's exit, a rubber gasket that tightly seals the exit pipe and prevents leaks and the rod that enables the user to move the gate and gasket into the desired position.