Grey water ( sink ) Drainage issue

[Bear&pop]

Happy new owner of this Starcraft 3612. Instead of sink water draining to the tank, it just fills up the drain tube and then backs up into the sink. Maybe 2 gallons worth. There must be a valve but I can't find it. Any suggestions??

Thanks Steve and Jessica

 

[PopUpSteve]

Should be an outlet on the outside which you would attach a gray-water tank.

 

[Sneezer]

I seem to recall that the Centinnial series had the sink and shower drains plumbed together. There should be an outlet under the pup with a valve. I think it is a 1-1/2” or 2” outlet. There is no tank for grey water, so you will need to come up with a solution. Many use buckets, aquatainers or a dedicatedd tote - I have a Rhino one myself.

 

[Raycfe]

Many pop ups just have a capped outlet on the side of the popup. Put bucket under cap and remove water should drain

 

[Bear&pop]

Thanks guys... I do have a gray water tank but it seems to service only the shower?? The sink drains only into the pipe running across the trailer with the cap. Seems strange.

 

[Sneezer]

Thanks guys... I do have a gray water tank but it seems to service only the shower?? The sink drains only into the pipe running across the trailer with the cap. Seems strange.

Not really. A pup with a dedicated grey tank that the sink plumbs into is a huge rarity, if it even exists. If there is a tank for the shower, it is probably around 20 gal. Mine has a tank, shower only, and the sink drains to the side of the pup.

 

[Sjm9911]

https://www.rvusa.com/rv-guide/2008-starcraft-centennial-expandable-trailer-floorplan-3612-tr663

If its this one, it has 0 gray water tanks listed.