2021 Momentum 353g waste tank capacities

[The Toyhaulers]

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!

 

[The Toyhaulers]

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.

 

[CoChris-MGRV]

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