Hi I copied below Rockwoods windjammer trailer specification. The 3029 has only one 38 gal gray water tank for the kitchen and bathroom. The 3006WK 3008W 3025W have two 38 gal gray tanks or 76 gal of gray water total.
Hope this helps Tim
WINDJAMMER TRAVEL TRAILERS
Hitch Weight
UVW
GVWR
CCC
Exterior Length
Exterior Height
Exterior Width
Fresh Water
Gray Water
Black Water
Awning Size
3001W
738 lbs.
7261 lbs.
8760 lbs.
1499 lbs.
35' 1"
9' 10"
96"
43 gal.
38 gal.
38 gal.
18 ft
3006WK
915 lbs.
7328 lbs.
8932 lbs.
1604 lbs.
34' 7"
9' 10"
96"
43 gal.
76 gal.
38 gal.
21 ft
3008W
882 lbs.
6994 lbs.
8900 lbs.
1906 lbs.
34' 7"
9' 10"
96"
43 gal.
76 gal.
38 gal.
21 ft
3025W
971 lbs.
7550 lbs.
8930 lbs.
1380 lbs.
34' 7"
9' 10"
96"
43 gal.
76 gal.
38 gal.
21 ft
3029W
918 lbs.
7428 lbs.
8939 lbs.
1511 lbs.
35' 1"
9' 10"
96"
43 gal.
38 gal.
38 gal.
8 ft & 14 ft
Hitch Weight
UVW
GVWR
CCC
Exterior Length
Exterior Height
Exterior Width
Fresh Water
Gray Water
Black Water
Awning Size
3065WA
968 lbs.
7419 lbs.
8986 lbs.
1567 lbs.
34' 7"
9' 10"
96"
43 gal.
38 gal.
38 gal.
14 ft
GVWR (Gross Vehicle Weight Rating) – is the maximum permissible weight of the unit when fully loaded. It includes all weights at the unit’s axle(s) and tongue or pin, inclusive of all fluids, occupants, cargo, optional equipment and accessories. For Safety and product performance do NOT exceed the GVWR.
GCWR (Gross Combined Weight Rating) – The maximum total weight of the loaded unit, plus a tow vehicle. This includes the weight of both the unit and tow vehicle, fuel for each, all other fluids, cargo, occupants, optional equipment and accessories.
UVW (Unloaded Vehicle Weight)* – the typical weight of the unit as manufactured at the factory. It includes all weight at the unit’s axle(s) and tongue or pin and LP Gas. The UVW does not include cargo, fresh potable water, additional optional equipment or dealer installed accessories.
CCC (Cargo Carrying Capacity) ** – is the amount of weight available for all fluids, occupants, cargo, additional optional equipment and accessories. CCC is equal to GVWR minus UVW. Available CCC should accommodate fresh potable water (8.3lbs per gallon).
**Estimated Average based on standard build optional equipment.
Each Forest River RV is weighed at the manufacturing facility prior to shipping. A label identifying the unloaded vehicle weight of the actual unit and the cargo carrying capacity is applied to every Forest River RV prior to leaving our facilities.
Floor plans and specifications are based on the latest product information. Forest River, Inc. reserves the right to make changes in drawings and specifications at any time without notice and assumes no responsibility for any errors in the site. The model number does not necessarily reflect the overall length of a particular unit.