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Old 09-20-2018, 03:06 PM   #1
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2018 Rockwood dual grey and black water tanks

I have found numerous threads on this subject, but no "model specific" answers, so here goes. Our control panel shows Black Water Tanks 1 & 2, and the same for grey water. Both #1's will fill up, even to the point where we have water backing up in the bathroom sink with the shower on once, but nothing ever registers on either #2 tank. I have checked under the trailer, and there is only one black water and one grey water drain. (The bottom is sealed) So, my question is, are there really two of each tanks, and if so, how do I utilize the #2 tanks?

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Old 09-20-2018, 03:34 PM   #2
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By drain do you mean "outlets "For a sewer hose? How many "Valve Handles are there? What Model# is your unit and Year? Help Us help you!Youroo! !

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Old 09-20-2018, 04:04 PM   #3
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A lot of the factories install a tank monitor that shows 2 gray tanks, when there is actually only one.
My TracerAir tank monitor has buttons for two gray tanks but it only has one.
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Old 09-20-2018, 04:30 PM   #4
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Sorry, I meant to add the model info. It's a 2018 Rockwood Signature Ultra Lite 8311WS. Yes, outlets. One grey water, and one black water valve, converge into the one sewer outlet.
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Old 09-20-2018, 06:16 PM   #5
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2018 Rockwood Signature Ultra Lite 8311WS has only a 45 gal gray tank. Our Rockwood 2902WS has a gray capacity of 75 gals in 2- 37gal tanks, both have thier own valves and are labeled on the outside of rig. The control panels are generic. Rockwood often uses 2 tanks in rear kitchen models
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black, black water, rockwood, tank, water, water tank

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