what part do I need to order - Hoover HNL7146 w.machine?

My hoover HNL7146 is leaking slightly from a double rubber bulbus thing under some electric circuits. The water pipe in the top back of the machine leads into these leaking rubber things (they look like twin rubber joints slighly rounded) which is in the top back of the machine underneath 2 black circuits. What will these/this be called so I know what to order? Please help.