In ever job I've had in the past 65 years....
Poop has always rolled down hill,
not once has it ever rolled up hill.
So with that said .....
pump or no pump,
macerators or no macerator,
garbage disposer or no garbage disposer.
poop is going to roll down hill.......
so the moral of this is (when you poop always be on top).......
If you are at the bottom you will get pooped on.......
just my 2 cents for today.
take it or leave