The pool store turned out to be not very helpful. I self-diagnosed using info from this web site. Turns out that the valve is likely an older Hayward Dial-a-Flow 3-way valve, since Hayward valve seal part SPX0733E fits perfectly. I unscrewed the pads/paddles on both of my valves and replaced...
As far as I know, The PoolCleaner does/did not come with interchangeable throats; the AquaNaut does and they can be used with The PoolCleaner (would need to order as replacement part(s) through Hayward dealer).
The attached image is of one of the two 3-way diverter valves in my plumbing system. There are no identifying markings on it that I can find, so I cannot determine the manufacturer. My pool was built circa 1987. I am not the original owner and do not know if this is original equipment. Upon...