RV Repair: RV plumbing, toilet flange, sink tank

Question
Looking for a plumbing diagram. Currently installing a new black tank & toilet. No grey tank or shower, small hand washing sink will go to new black tank also. Question is should I vent this new tank (35 gal.) Tank located in floor, will mount toilet & sink over tank. Thank You

Answer
Mike
Tanks all have to vented, to assist in both filling and draining.
You can vent through the floor to the roof or install a tank vent, they are only about 3 inches tall and plug into the top of the tank.
As far as a diagram ,there is not much to it . Most toilets mount directly over the top of the tank, then the vent goes wherever it fits, between the tank and the floor, then of course there is the 3 inch drain with dump valve, which will have to be plumbed. Thats a "where it fits and can be gotten to,to drain " deal.
You'll also need your tank top drain from the sink.
Tank grommets (rubber) are easy to install and the best way to install your toilet flange connection, vent and sink drain.
Tank straps will need to be strong enough to hold all of that liquid weight...35 gals x 8 lbs= HEAVY
Good luck.
If you e-mail me I'll send you a drawing of the design
rvphd@yahoo.com

Thom