What are the most common diverter types?

There are three main kinds of shower diverters, single, two-valve, and three-valve diverter.

A single valve diverter (aka tee diverter) switches water flow between tub spout and showerhead.

A two-valve diverter uses one handle to control water temperature and another handle/valve to control water direction.

A three-valve-diverter has one handle to operate to control the water direction, in which it can direct to three different channels.