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Davidlee64's avatar
Davidlee64
Explorer
Feb 05, 2019

Black and Gray Tank issue.

I have been living in my 36' fiver about 1 1/2 years. I have never put any solids or TP in the toilet. Gray is only for normal usage, dishes, showers, etc. I empty the tanks no more than a week. All has been well. We poured a slab and the fiver has been relocated to the slab.
I went to empty the tanks, like normal, and nothing came out of either tank. Gray valve is a bit difficult to operate, but this is not new. Black valve works like normal. It has been about a week since the move, and only normal use, but still unable to empty. I would like to empty them for piece of mind to say the least.
I have used the flush attachment to add water, and that comes out no issue. What additive would be advised to try and get this to work normally? I am not a happy camper not knowing how much is in the tanks.
  • I have a device that allows a hose to hook to the 3" drain line. I can control which tank the water goes into by the individual tank valves. Water goes in, but I have yet to figure out where it is actually going. The sensor lights are showing 3/4 for black, and 3/4 or hovering at 4/4 for the grey. I noticed after all the fooling around, when I flush the toilet, it sounds like the tank is empty. Now for the last couple flushes, it sounds like some water is accumulating. I am going to add about 5 gallons of water into the toilet and see if I get a noticeable output. My next step is going to be to open the grey line at the valve and attempt to replace the valve. It is getting difficult to operate. If it leaks good after opening, I will try to drain the tank then replace the valve.
  • I added zerk fitting to my valves and put a bit of grease in them from time to time.
  • Is this getting funny ?
    Logical thinking tells me if liquid only, goes in the tank, and liquid drains out, the tanks are indeed empty !!

    I sure hope you are not even looking at the indicators, much less believeing them !!