O-ring size used in Perko FlushPro for Moomba Mondo 2014?

[bjrow]

Hey guys, have one of the above flush kits (factory option) in the boat and need to replace the O-ring as it drips slightly with the hose connected.
Just wondered if anyone knows the O-ring size?
Cheers BruceR.

[bjrow]

Just wondering if anyone knows the size of the FlushPro, 5/8", 1" or 1 1/4"?
Might look at buying a complete replacement as a backup.
Cheers BruceR.