This instructional video shows you how to repair or replace the Flex Hose Assembly on a Centaur Floor Machine (Rabbit-1, Rabbit-3, and Stonechat).
The Flex Hose Assembly includes a valve switch, brass couplers, and the flex hose itself.
This video shows the flex hose assembly being replaced on a Rabbit-1, but the process is the same for any other Centaur machine.