The Thetford Aqua Magic IV model toilet comes with either a foot pedal flush or hand flush. The flush mechanism is the only difference between those two models. Water valves, seals, etc. are all the same and they are listed below for your convenience.
Thetford model numbers can be found on a small white decal at the rear base of your toilet. They are 5 digit numbers and pertain to the specifics of your model. If the number listed below matches that of your toilet, you have an Aqua Magic IV and you can view/ order replacement parts based on that.
Thetford Aqua Magic IV Model Numbers: