anyway to tell from the outside if it has these "constant pressure" delivery valves?
ate they swapable as well?
The holder is visually different/shorter, they can be swapped but the holder(barrel) has to be swapped also. Personally I would avoid any pump from a bus application, they are very underwhelming for almost any purpose.
Aren't most of them 11mm plunger pumps?
Chris
Aren't most of them 11mm plunger pumps?