Gulf Stream Owners RV Forum - View Single Post - 2009 Supernova rmaster bathroom sink not hooked up to Grey, but hooked up to black !

Chuck v · 09-20-2021, 01:32 PM

This is common to have the bath sink going to the black tank. More black tank issues are due to too little water being used with the waste than any other issue or cause. It does not need to be "fixed" or changed. My 2007 Tour Master diesel pusher coach also had the bath sink going to the black tank...this is a feature and not an error.

Note this statement from another RV website:
The RVIA standards only allow one sink to drain into the black tank. Most commonly that will be a bathroom sink due to the plumbing, tank layout, and tank capacity. The bathtub is never allowed to drain into the black tank due to the obvious backup hazard.

Chuck

09-20-2021, 01:32 PM	#2
Chuck v Senior Member Join Date: Dec 2009 Posts: 1,027	This is common to have the bath sink going to the black tank. More black tank issues are due to too little water being used with the waste than any other issue or cause. It does not need to be "fixed" or changed. My 2007 Tour Master diesel pusher coach also had the bath sink going to the black tank...this is a feature and not an error. Note this statement from another RV website: The RVIA standards only allow one sink to drain into the black tank. Most commonly that will be a bathroom sink due to the plumbing, tank layout, and tank capacity. The bathtub is never allowed to drain into the black tank due to the obvious backup hazard. Chuck __________________ 2007 Tour Master T40C Acura MDX toad "It takes a great deal of time to recover from any improvement..."