We purchased a new fifth wheel and the sink on the outside kitchen drains into a pipe that runs directly to the other side and has a cap on it. Remove the cap and it drains directly onto the ground. This is the first model I have heard of where the outside kitchen sink is not routed to a gray water tank. It seems useless to have a sink that drains directly to the ground or to have to carry an external tank to drain it into.Has anyone heard of this design before?

the capmight be for cleaning and or winterizing what type of fifthwheel is this

Moved from Forum Technical Support

It is by Grand Design ... they've only been in business since 2012 so they are new.We turned on the outside kitchen sink to clear the line and it didn't drain ... we tried to figure out why it was stopped up and we followed the pipe from the sink to the drain ... not routed to the gray water tank. It is routed straight out .. the pipe runs to the other side of the trailer and has a cap on the end. Open it up and it drains right out on the ground.

Well at least they put on the backside, keeps it off your feet while washing :)

Is the cap a type that you can connect a sewer hose?

Outside Kitchen Sink Drain | Good Sam Community

newman_fulltime
Explorer II
Sep 09, 2014
the capmight be for cleaning and or winterizing what type of fifthwheel is this
1492
Moderator
Sep 09, 2014
Moved from Forum Technical Support
lewtex38
Explorer
Sep 09, 2014
It is by Grand Design ... they've only been in business since 2012 so they are new.
We turned on the outside kitchen sink to clear the line and it didn't drain ... we tried to figure out why it was stopped up and we followed the pipe from the sink to the drain ... not routed to the gray water tank. It is routed straight out .. the pipe runs to the other side of the trailer and has a cap on the end. Open it up and it drains right out on the ground.
Tin_Pusher
Explorer II
Sep 09, 2014
Well at least they put on the backside, keeps it off your feet while washing :)
bpounds
Nomad
Sep 09, 2014
Is the cap a type that you can connect a sewer hose?
Campinfan
Explorer III
Sep 09, 2014
I think I would contact Grand Design. Something sounds not quite right about this. My Cougar goes to the galley tank. If bpounds is right, I am thinking there is a handle for a gray/galley tank that is open someplace.
lewtex38
Explorer
Sep 10, 2014
It does have a sewer hose connection under the cap. There is not a bypass/switch to route it to the gray tank.
We called Grand Design and spoke to a CSR and he claims that is the way it's designed. I am just trying to figure out whether it's worth calling them and speaking with someone to find out if it can be rerouted and since it seems to be an engineering flaw will they pay for it. Just wanting some outside opinions.
Lantley
Nomad
Sep 10, 2014
It is very common for outdoor kitchen sinks not to drain into a tank. As someone mentioned at least yours went to the far side of your rig. Some require a bucket beneath the sink. Often the sink elevation is lower then the tanks. THe 1st rule of plumbing states stuff does not flow uphill!
lpxguy
Explorer
Sep 10, 2014
that sounds completely outrageous! No way in hell I would accept that!
garysol
Explorer
Sep 10, 2014
lpxguy wrote:
that sounds completely outrageous! No way in hell I would accept that!

Me either. One of the dumber things that I have heard an RV manufacture doing and I have heard some doosies!