Forum Discussion

Explorer

Nov 21, 2015

stopped up sink

I have a stopped up kitchen sink. I took the p-trap out and cleaned it out. No luck. I then pulled the trap out again and pushed a snake down the drain. That didn't work either. Even tried the baking soda and vinegar followed with hot water. I am new to the RV thing. I opened the grey tank valve and let out the water from that. The bathroom sink and shower drain as normal. I noticed there is 2 grey and 2 black tanks listed on the control board. Is it possible there is really 2 each? Each has a different reading. 1 grey and 1 black show them to be full and 1 grey and 1 black shows a low reading. I hope someone can enlighten me and tell me how to fix this problem.

34 Replies

TrickyRicky
Explorer
Nov 21, 2015
All fifth wheels I have worked on have a separate grey tank for the kitchen sink because of the difference in height to the bathroom. How long have you had this rig? Did you ever see an additional 3rd dump valve outside maybe at a different location than the other 2. I would start by looking for that dump valve and if try draining that tank. I am assuming this is a new unit to you and this is the first time the sink has backed up.
eerickson4
Explorer
Nov 21, 2015
I have a 5th wheel. Just 1 bedroom 1 bath.
TrickyRicky
Explorer
Nov 21, 2015
You probably have a separate tank for your kitchen sink. Is this a fifth wheel or TT if a TT does it have 2 bathrooms?
old_guy
Explorer
Nov 21, 2015
you might have a galley tank that needs to drain also. mine is located just in front of the front wheel on drivers side.