Forum Discussion

eerickson4's avatar
eerickson4
Explorer
Nov 22, 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.
  • old_guy's avatar
    old_guy
    Explorer
    Nov 22, 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.
  • TrickyRicky's avatar
    TrickyRicky
    Explorer
    Nov 22, 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?
  • TrickyRicky's avatar
    TrickyRicky
    Explorer
    Nov 22, 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.
  • azdryheat's avatar
    azdryheat
    Explorer
    Nov 22, 2015
    Your kitchen sink gray tank is full. Get under your 5'er and look for that elusive drain valve handle.
  • robsouth's avatar
    robsouth
    Explorer II
    Nov 22, 2015
    TrickyRicky wrote:
    All fifth wheels have a separate grey tank for the kitchen sink because of the difference in height to the bathroom.


    Very not true. I've had several and none had a separate tank for the kitchen sink. Where did you get that information?
  • eerickson4's avatar
    eerickson4
    Explorer
    Nov 22, 2015
    I hope there is an elusive kitchen grey valve I haven't noticed. That would be an easy solution. I have only had this RV for 6 weeks and it's my 1st time using it. It's a Dutchmen Denali. Maybe someone else has one and had the same problem.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Nov 22, 2015
    100's of models and mfg so it would be nice to know WHICH RV you have.....year/brand/model makes it easier for folks to help with info

    Monitor panel is probably generic and with just 1 bathroom you most likely have just 1 black tank BUT 2 grey tanks
    A galley for kitchen only and then a grey for bathroom sink/shower

    Sink stopped up after you have cleaned 'P' trap and snaked line.......galley tank if FULL

    Look around the roadside (drivers) trailer tires for the dump valve for that grey tank. It may tie into the main drain line OR it may need it's own hose hooked up to drain but it will have it's own drain valve
  • Dave_H_M's avatar
    Dave_H_M
    Explorer II
    Nov 22, 2015
    Sometimes the labels can be misleading. My grey and black tank labels were reversed. :R
  • Roger10378's avatar
    Roger10378
    Explorer II
    Nov 22, 2015
    On many units the 3rd valve is in the wheel well. You can also get a good idea where it is by where the sink is. Most tanks run across the trailer and more or less line up with the fixtures they are serving.

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