This repair kit is for a Par model # 29090-0000 head used on many Catalinas. It is suitable for heads manufactured (not boat manufactured) after October 1997 and until 2007. See the photos below under "More Images" for additional help in determining which head you have .
There are however two characteristics which make this head unique. 1) It has a black plastic pump handle with rounded contours (#17 above). There are no square corners. 2) The valve lever which changes from the flush to pump dry is red plastic (#23 above) on early models, black on later models. It is shaped somewhat like a flag. To change positions, it moves left or right.
For a larger view of the parts diagram above, open the full size PDF by clicking below under "Read More"