Originally Posted by Stinkytofu
That black pipe is worrisome! If I buy a used unit at around $10-12K, I wouldn't want to tear that piece out on the first run. Is that pipe made of PVC or some kind of metal? Are there mods to tuck that in?
Sorry for the rant and questions.
I've heard that there's a guy that makes a good living by repairing/replacing/modifying that part of Casitas...and I think the problem exists on other fiberglass trailers, too. Unless they're lifted as described above, most are just too low to the ground to begin with to supply good clearance for a four-inch pipe/valve combo.
But since you're in the planning stages, don't automatically rule out getting something with a cassette- type toilet, illustrated below. It's still a permanent install, but in my opinion much easier to manage than an onboard black tank since one removes the tank itself for emptying, which can be done in any toilet/outhouse/trailer dump- or even in a properly dug and prepared latrine hole if one's out in the boonies. One doesn't have to move the whole trailer and find a trailer dump just because the tank's full.
And of course there's no plumbing below the floor at all...
The same of course is true of the good ol' porta-potty, but the convenience of outside-the-trailer removal of the cassette tank is nice! I myself have a porta potty, but if my trailer design allowed it I might replace it with a cassette.
I wouldn't trade either one, though, for a permanent black tank as I don't like to be tied to the tyranny of the must-find-an-RV-dump that comes along with it.
Link to Cassette Toilet Operation