Coachmen: Holding tank sizes/locations

[breidben]

Hello, newbie to this forum and RV ownership. Just bought a 1999 Coachmen Santara from the original owners and have a question that I can't find the answer to anywhere. I'm looking to install a black water tank flusher and can't find the tank! I've looked underneath where it should be. I'm pretty handy with this but obviously don't want to mess it up! Anybody else out there done this on the same or similar model? Also does anyone know the sizes of the holding tanks? Have the owner's manuals but they don't seem to reference it, just the fresh water tank size (75 gal). Thanks!!

[subford]

The water closet should dump right in to it. It should be inside of the compartments on the center line near the dump valves.

My black tank is 35 gallons.

[breidben]

Thanks Bill for the quick reply! I guess I wasn't looking far enough under. We were boon docking over the weekend and the black tank filled up a lot faster than we thought. I didn't get the chance to experiment too much with it but I wonder if the bathroom sink drains into the black tank as well.

[subford]

It should go to the gray tank but I have never traced it on mine.