After the roaring success of the prototype sullage sump (and auto pump) ... the final design is complete, up and running and with a few mods that developed during rigorous testing by our field test crew (me) at our large test facility (the Ballarat Goldfields Holiday Park)
All 3 sullage outlets have been relocated/re-plumbed so they are lined up and are now as close together as the chassis mounted saddles would allow. That just helped to reduce the footprint and size of the sump tub required. I poo poo'ed the 45deg outlets; I could see the point in having 45deg anyway, and I replaced them with 90deg elbows which keeps the waste setup a bit further under the van and less likely to be kicked or tripped over
I reduced the sump size considerably from the prototype; With a big tub, I found that the waste water didn't accumulate anywhere near what I thought nor anywhere near enough to warrant a 20 lt. tub.
A cutlery drainer is used as a strainer under the sink/basin wastes to stop the noodles, half eaten chicken nuggets and toys from blocking the pipes.
The sump works for both gravity down hill sullage point, and those pesky uphill waste points with the auto 12v pump. The 12v outlet is on the left, and the gravity discharge on the right; just swap the screw in sullage hose bayonet with the stop cap depending on which one your using. The gravity discharge is on the bottom of the sump, and the 12v discharge matches the height of the 12v pump outlet, about 2 inches from the bottom. The gravity discharge drains to empty, but on the 12v pump theres always about an 3/4 inch of waste sitting in the sump.
Most of the time I suspect the pump will not be plugged in, and the sump will simply be a small gravity discharging sump that will buffer 10ltrs of waste.
The joiner bridle in the middle of the pipes just keeps the parts to a minimum, and the connectors allow the lower pipes to be disassembled so everything can be stored in the sump for transport.
I had to to run a 12v Narva power outlet close by to plug the pump into.
It takes probably a little less time to connect the sump than to connect the standard Jayco offering, the gravity or 12v adds no additional time, and it ensures great flow every single time and protects the van from waste backing up. All the hose and tap fittings are kept in the sump as well, which was bonus.
Bloody genius I say