Keystone RV Forums - View Single Post - Unable to completely empty black water tank

realgoodbear · 11-05-2018, 08:38 AM

I have the same problem. I have a clear plastic extension on my discharge pipe with a manually operated valve (due to the issue I'm having). When I flush the black tank, I believe I am doing a thorough job and the water runs clear. Once I believe it is finished draining, I close everything. Once I move the trailer I see light brown water in the clear plastic extension EVERY time. I suppose my problem is really that my factory installed valve is faulty, but if the tank is empty why is there anything still coming out? I have had the trailer in for repair of the black tank valve and they told me it was just "gunked" up and once they thoroughly rinsed it, it was "fixed". I never put tissue of any sort in the toilet, the only thing that goes in there is ummmm.....stuff. It is a 2015 Voltage 3895. Any advice out there?

11-05-2018, 08:38 AM	#14
realgoodbear Junior Member Join Date: Apr 2015 Location: Chesterfield, MO Posts: 3	I have the same problem. I have a clear plastic extension on my discharge pipe with a manually operated valve (due to the issue I'm having). When I flush the black tank, I believe I am doing a thorough job and the water runs clear. Once I believe it is finished draining, I close everything. Once I move the trailer I see light brown water in the clear plastic extension EVERY time. I suppose my problem is really that my factory installed valve is faulty, but if the tank is empty why is there anything still coming out? I have had the trailer in for repair of the black tank valve and they told me it was just "gunked" up and once they thoroughly rinsed it, it was "fixed". I never put tissue of any sort in the toilet, the only thing that goes in there is ummmm.....stuff. It is a 2015 Voltage 3895. Any advice out there?