Is it possible to drain waste ?

Bob Shaw wrote:
There are some dump station that are configured where you could do that, but the effluent comes-out pretty fast, and splashes all over the place, and makes a mess. Cleaning-up by hosing the area down takes more effort and time than just going ahead and using the slinky. I know this because someone ahead of me did it and did not clean-up after himself.

Yes, I have been to a campground that just had a grate to dump onto/into. You just pulled up, lined up the waste pipe, and opened up. Hosed things off afterwards -- rather gross spraying the "stuff" down between the grates. Using a slinky... that would just have gotten the slinky covered in "stuff", and wouldn't have helped in any way that I could think of. Oh, and I have not been back to that campground!

I also did see someone just open up the pipe at a normal dump station at a state park. A Ranger ended up coming over, not too happy, to explain to the person what to do (I arrived near the end of the situation). The person was new, and honestly did not know what to do.

To the original poster, there is no reason why it wouldn't "work" to just open the pipe without a slinky, but unless it is a special circumstance (like an outdated dump station that I won't go to again!) there really is no reason to not use a slinky.