Originally Posted by MNbusboy
Thanks!! I think composting would be easiest to install and would accomplish the task, but the ladies in my life would prefer a standard toilet system with black tank. (They don't mind giving me added work and headaches, in fact they seem to make a mission of it!!��)
If I go with composting I can figure out the sink plumbing myself. If I go with the full black tank, any thoughts or recommendations?
Mount a 30ish gallon fresh water tank and wire a 12v pump to your fuse block (share an accessory fuse). Use PEX to plumb to your sink and toilet.
You need a black tank under the bus. The rear of the bus is a good spot because there’s usually a lot of spare room there.
There’s a couple types of RV toilet for a black tank: a simple gravity toilet (least expensive and easiest to install), and a macerator toilet that has a little grinder that turns everything into a slurry. The macerator toilet is good if you need to pump across the vehicle to a remote tank. It also makes waste uniform so that emptying the tank is also simpler. It may also pump the waste out of the tank.
I think unless you have a compelling reason to pump your poop, get a gravity model. May I suggest a Dometic 320; elongated porcelain bowl, power flush, easy to clean , comes in white or bone. About $250.
The whole setup, fresh and black tank, toilet, and water pump with all the fittings, will run you about $1000, though you might save money on tanks off eBay or used from salvage or using smaller tanks. It all depends on your willingness to search and wait and what kind of space constraints that push you to buy what works.