Is it possible to drain waste ?

OMG. You must be kidding me. Use the hose lol. We raised eight children and I had no problems with me cleaning them. Even their smelly vomit. I didn't test my first new hose before we went to dump. Basically we had a small air leak and that is the grossest smell in the world. I surely lost my gag reflex that one time. I even tossed all my clothes on the MH steps into a big plastic bag and got rid of that also. Never again. When I lived in Alaska this was the best fertilizer around. How do you think they grow such large veggies? Of course you had steps to follow to make sure it was safe for crops and veggies. NO MORE. But on the other side my gray tank goes onto my yard as does my kitchen drain and washer drains. I've got no mosquitos, fleas or ticks in my yard btw, plus no smell.