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myredracer's avatar
myredracer
Explorer II
Sep 15, 2018

Total holding tank volume for two gray tanks? UPDATE

I had to pull down the underbelly coroplast recently due to an overflowing toilet. (:M)

I found that the gray tank for the bathroom is 20 gallons (per sticker on the tank). The printed factory brochure volume for our galley + bathroom gray tanks is listed as 60 gallons. So does that mean we have a 40 gallon galley tank and a 20 for the bathroom? Seems odd.

The online factory brochure is slightly different and says the total gray tank volume is 64 gallons which would suggest 2 x 32 gallon tanks. That would also be the same as the black tank.

Did the factory screw up or short change us? Our black tank is 32 gallons per the factory info. I would like to see what the sticker on the galley tank says but it's a real b*tch of a job taking the coroplast down and putting it back up. I could use a 5 gallon container and see how many times it takes to fill the tank up with water.

Wouldn't you want the bathroom tank larger because of the amount of water used for showering?
  • If you want 32 gallons and you think it will fit I believe it will be your cost to do the swap. Maybe that is not right but I think it is probably a little late for a claim. No harm to call... you might get a compromise.
  • pnichols wrote:


    Our kitchen sink and shower drain into the grey tank. Our bathroom sink and toilet drain into the black tank.


    That would upset me very much. I don't mind draining off the grey tank with portable containers, but I don't want my black tank filling up!

    pnichols wrote:

    I wonder how many folks pay attention to tank capacities as criteria when shopping for a new or used RV? IMHO, tank capacities is a very important consideration.


    It's in my top 3 for sure. I ruled out a few models because of 25 gallon grey tanks.
  • You have no recourse on dealing with the dealer or KZ. The brochures ALL state specifications can change at any time. That is the standard CYA for all products. Doug
  • dougrainer wrote:
    You have no recourse on dealing with the dealer or KZ. The brochures ALL state specifications can change at any time. That is the standard CYA for all products. Doug


    Yea, I figured it was pretty much impossible. Between the dealer and the manufacturer it's been hell, including an issue that required us to sign an NDA so can't talk about it.

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