Instead of hanging the macerator off the black/gray drain, can I add a couple feet of hose between them, allowing the macerator to set on the ground? Any reason not to?
I think it is. Now, if you were driving down the road with it hanging on there, I would give a different answer. Driving down the road, when you hit speed bumps or potholes, you have a dynamic load that is many times higher than just the weight of the macerator hanging on there while it is sitting still.
Bobbo and Lin 2017 F-150 XLT 4x4 SuperCab w/Max Tow Package 3.5l EcoBoost V6 2017 Airstream Flying Cloud 23FB
Done it up to around 30 feet on one occasion. (Had to use a portable battery for the pump).
At least one model comes with a short length of 3" hose on the inlet (This model is mounted in the RV.. gives you the choice of using the pump or a straight 3" stinky slinky).
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