Way back at the beginning of this thread, I recall
mutcth asking about a holding tank with a lower intake port. Here is what I use with my Safari. The height is about 7.75 inches, which works fine.
I earlier bought a 22 gallon one, which was way too high.
This one is 16 gallons, and fits well into the pickup bed. However, hauling it to the dump means getting that up into the bed (and it is heavy). So I have a ramp and a
pulley connected to the front of the bed to hoist it up. Easy that way.
This, being smaller, I can actually haul it by hand to the dump. The bobble is useless. The tote tank towing bracket is useless. But the tank works for the height of the Safari dump valves.
Barker 15 Gallon Tent Camper RV Portable Holding Tank
See
Save at RV Partscenter - RV Parts and Supply for the tank
By the way, I NEVER use it for black. Tote tanks are too unstable. Black fills up slowly, and should not be dumped until at least 1/2 full. Most people will move
by that time.