Unit Specs
- Stock #15247
- Year2026
- ManufacturerForest River
- Make Forest River
- ModelSandpiper
- Floorplan3990FL
- Type Fifth Wheel
- ConditionNew
- Length43' 6"
- VIN4X4FSAS22TJ049122
- Price $75,999.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps8
- Water Capacity (Fresh)50 gal
- Water Capacity (Black)50 gal
- Water Capacity (Grey)80 gal
- Slideouts5
The campground will feel like home in this 2026 Forest River Sandpiper 3990FL. By owning this 2026 Forest River Sandpiper 3990FL, you’re joining the Forest River family! The sleep capacity allows you to bring up to 8 along on your travels in this rig. This rig cuts no corners on space, expanding into a massive living area with 5 slides. The 50 gallon fresh water tank is just right for easy RV traveling.
2026 Forest River Sandpiper 3990FL Features
2026 Forest River Sandpiper 3990FL Specifications
Height
13' 4"
Length
43' 6"
Width
8' 0"
Dry Weight
12,439 lbs
GVWR
15,375 lbs
Hitch Weight
2,825 lbs
Payload Capacity
2,936 lbs
Refrigerator Capacity
16 cu ft
Sleep Capacity
8
Water Capacity - Black
50 gal
Water Capacity - Fresh
50 gal
Water Capacity - Grey
80 gal
# Awnings
1
# Axles
2
# Doors
1
# Slides
5
Hitch
Fifth Wheel
# A/C
2
A/C Spec
15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C
2026 Forest River Sandpiper 3990FL Literature
Gillette's Interstate RV
7210 East Saginaw Street
Haslett, MI 48823
Member Since 2009
See 366 ReviewsUnit Specs
- Stock #15247
- Year2026
- ManufacturerForest River
- Make Forest River
- ModelSandpiper
- Floorplan3990FL
- Type Fifth Wheel
- ConditionNew
- Length43' 6"
- VIN4X4FSAS22TJ049122
- Price $75,999.00
- Need to know your payment? Use our RV Loan Calculator!
- Sleeps8
- Water Capacity (Fresh)50 gal
- Water Capacity (Black)50 gal
- Water Capacity (Grey)80 gal
- Slideouts5
Email Dealer
Request More Info on this 2026 Forest River Sandpiper 3990FL Offered for sale by Gillette's Interstate RV
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