Yes, A couple of different types in fact.
The one I have has connectors so I can hook up an "Extension" hose from Gray 2 (Wash) tank, and the main also Extension hose from the Main gray/black tank port to a combined hose (Regular ground hose) to the hole in the ground.
Option 2 is a smooth "Y" you push the cut end of the hose on and clamp it, like you do with the connectors now.
Camping world and most major RV stores have 'em.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times