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  1. #1
    Setting Up Camp The Toyhaulers's Avatar
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    2021 Momentum 353g waste tank capacities

    I am finding it very confusing to decide just how much waste water capacity I have and if and how they work together. I believe I have 2 gray tanks, 1 for the shower and bath sink and 1 for the kitchen sink. I believe these gray tanks are both 52 gallons each and I hope they equalize for a total of 104 as shown in the literature. These dump out of 1 gray waste valve which is in the Nautilus System compartment. Also located in the Nautilus compartment is the 52 gallon black tank valve for the main bath. I do not have the 1/2 bath but do have the washer/dryer connections so I assume that I have a 2nd 52 gallon black/gray tank with a separate dump valve by the back wheel. Is that right? If not, please feel free to set me straight!

  2. #2
    Setting Up Camp The Toyhaulers's Avatar
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    Not a single reply to my post above. Am I in the wrong area? I would LOVE to know tank capacities for the 2021 353. The specs sheet, brochure and all advertising list 104 gray and 52 black. Is that without the 1/2 bath tank???? This same spec sheet only lists the 1/2 bath as "optional" so you would think that the capacities listed would not include the optional bath tank... If that is the case, then we have a 52 gallon gray tank for shower and bath sink and a 52 gallon tank for the kitchen sink for a total of 104. Since I had a 60 gallon gray tank on my little bitty Shockwave TT, you would certainly hope that the 353 would have 104 gallons.
    The Toyhaulers
    Colorado
    2021 Momentum 353g
    VIN 573FM4023M1119242

  3. #3
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    Quote Originally Posted by The Toyhaulers View Post
    Not a single reply to my post above. Am I in the wrong area? I would LOVE to know tank capacities for the 2021 353. The specs sheet, brochure and all advertising list 104 gray and 52 black. Is that without the 1/2 bath tank???? This same spec sheet only lists the 1/2 bath as "optional" so you would think that the capacities listed would not include the optional bath tank... If that is the case, then we have a 52 gallon gray tank for shower and bath sink and a 52 gallon tank for the kitchen sink for a total of 104. Since I had a 60 gallon gray tank on my little bitty Shockwave TT, you would certainly hope that the 353 would have 104 gallons.

    I would suggest calling Grand Design customer service with your VIN and ask specifically what tanks are in YOUR trailer. I have found them very helpful in answering questions on my specific trailer if I give them the VIN.

    Chris
    Chris & Karen
    Fort Collins, CO
    2017 F-350 SRW 6.7 Lariat Value CC LB 4x4
    2018 Solitude 310GK

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