Bathroom Sink Connection

[bend302]

All of the time I have owned this 2005 GT XL, I have assumed that the bathroom sink drained unto the gray tank.

WRONG...it drains into the black tank.

While dumping and flushing my tanks, I was adding water to the gray tank trying to flush it a little by running water into the bathroom sink. To my surprise, nothing came out when I opened the gray tank valve but water gushed out of the recently dumped and flushed and supposedly empty black tank.

Through a process of running water with the valves open, I determined that the shower and kitchen go to the gray. Commode and bathroom sink to the black tank.

Am I the only person that didn't know this?

Bill

[ramair]

While I understand the reasons behind this but I did not know that. On my 378XL I believe they all drain into the gray, and only toilet goes to black. I will have to check and insure that I am correct.

[jojo bamboo]

I'll have to check mine also (2008 373 Georgetown)
and the way they throw these things together
nothing would surprise me.
now quit complaining
be thankfull the slideouts don't come out when you flush the toilet.

[msm1827]

Mine to I've tried to figure out how to reroute it. Haven't figured it out yet.