The north facing toilet is wierd because no amount of effort can turn my south facing reference into a north facing one. The game also cuts the top off no matter how much I shrink it down. This was meant to be a joke so don't expect perfection. If someone wants to make a serious effort in creating a toilet pump, go right ahead... As if someone can take that seriously.
In game view
I would suggest renaming the originals offshore-pump-backup so you can revert back once you're tired of the joke.