It's not a big deal. There's a pipe with a quick connect hose on the underside of the rig...the hose goes into a pipe in the ground. There's a valve for grey an

It's not a big deal. There's a pipe with a quick connect hose on the underside of the rig...the hose goes into a pipe in the ground. There's a valve for grey and black water; you dump black, then grey. It's included in the fees of RV parks, as most have "full hookups" (which means, electric, water, sewer, and maybe cable), or you can pay $5-$10 to dump without spending the night at most RV parks with dump stations. Some cities provide RV dump stations for free to encourage tourism, and some businesses offer them for free to encourage shopping there, mostly in the west and in Canada. It takes about ten minutes, if you're also filling up the fresh tank. My rig usually is running low on fresh water about the time my grey water tank is full, so it works out reasonably nicely. If I'm trying pretty hard to conserve water, I can go two weeks between visits to the dump station. Otherwise, I dump a little over once a week.