I take care of unwanted and abused pets, and occasionally I have to bathe them in a bathtub. Sometimes they go poop and it breaks up in the water so it cannot be scooped out. When this happens, I have to spray it down the tub drain with a hose. Over time, the drain clogs, and I have to use Liquid Plumber to clear it out.
Could a shower / bathtub be connected with a direct drop like a toilet instead of a p-trap or would sewer gas come back up since there would be no water in a p-trap to stop it?