2026 Forest River Sandpiper 3990FL

New Fifth Wheel in Haslett, Michigan, 48823

$106,491.00
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New 2026 Forest River Sandpiper 3990FL available in Haslett, Michigan

Unit Specs

  • Stock #15247
  • Year2026
  • ManufacturerForest River
  • Make Forest River
  • ModelSandpiper
  • Floorplan3990FL
  • Floorplan LayoutFront Entertainment
    Front Living Area
    Kitchen Island
    Loft
    Rear Bedroom
  • Type Fifth Wheel
  • ConditionNew
  • Length43' 0"
  • VIN4X4FSAS22TJ049122
  • Price $106,491.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Exterior ColorWhite
  • Sleeps8
  • Water Capacity (Fresh)50 gal
  • Water Capacity (Black)50 gal
  • Water Capacity (Grey)80 gal
  • Slideouts5
  • Tow/Hitch Weight2825 lbs

Forest River Sandpiper fifth wheel 3990FL highlights:

  • Outside Storage
  • Theater Seating
  • Kitchen Island
  • Upper Loft

 

The perfect fifth wheel for a larger family! This unit sleeps eight people the loft above the rear master bedroom and bathroom. In the loft area, there are two 44" x 74" bunk mats for comfort as well as wardrobe/storage at the head of each. The master bedroom features a king size bed that slides out to create more space by the bed. A spacious bath features a one-piece fiberglass shower for comfort.  A spacious kitchen features two slides, a free-standing dinette in one, and the 12V refrigerator and stove in the other. There is also a center island with large sink for added food prep space. Head up the steps in front to a dual slide front living area with 50" TV and fireplace beneath the window. There is also theater seating opposite the TV, and a tri-fold hide-a-bed in each slide allowing added sleeping space when needed.

 

You will find the perfect balance of size, space, features, and luxury with any one of these Forest River Sandpiper fifth wheels! They have a cambered powder coated frame with rust prohibitor, and a fully enclosed underbelly for added protection against the elements. Also, the power front jacks with spring-loaded pins enhance the convenience, speed, and safety. The large, tinted windows come with a 80/20 UV prohibitors. Some hassle-free amenities include a 60k BTU on-demand water heater, porcelain foot flush toilet(s), tire pressure monitor system, and an electric leveling system! Inside, you'll enjoy stainless steel kitchen package, solid surface kitchen countertops, Beachside Sundance Congoleum linoleum, recessed residential lighting, and many more comforts!

  • Front Entertainment
  • Front Living
  • Kitchen Island
  • Loft
  • Rear Bedroom

2026 Forest River Sandpiper 3990FL Features


  • Exterior
    Slideout

2026 Forest River Sandpiper 3990FL Specifications

Dimensions

Height

13' 4"

Length

43' 6"

Width

8' 0"

Weights

Dry Weight

12,439 lbs

GVWR

15,375 lbs

Hitch Weight

2,825 lbs

Payload Capacity

2,936 lbs

Capacities

Refrigerator Capacity

16 cu ft

Sleep Capacity

8

Water Capacity - Black

50 gal

Water Capacity - Fresh

50 gal

Water Capacity - Grey

80 gal

Exterior

# Awnings

1

# Axles

2

# Doors

1

# Slides

5

Hitch

Fifth Wheel

Electrical

# A/C

2

A/C Spec

15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C

*MFG Specs are for base unit. Certain options may change specifications listed. Please consult dealer for more details. Data is provided by a 3rd party. RVUSA.com cannot guarantee the accuracy of the data presented.

2026 Forest River Sandpiper 3990FL Literature


Seller Info

Gillette's Interstate RV

7210 East Saginaw Street
Haslett, MI 48823

Member Since 2009

See 357 Reviews

Unit Specs

  • Stock #15247
  • Year2026
  • ManufacturerForest River
  • Make Forest River
  • ModelSandpiper
  • Floorplan3990FL
  • Floorplan LayoutFront Entertainment
    Front Living Area
    Kitchen Island
    Loft
    Rear Bedroom
  • Type Fifth Wheel
  • ConditionNew
  • Length43' 0"
  • VIN4X4FSAS22TJ049122
  • Price $106,491.00
  • Need to know your payment? Use our RV Loan Calculator!
  • Exterior ColorWhite
  • Sleeps8
  • Water Capacity (Fresh)50 gal
  • Water Capacity (Black)50 gal
  • Water Capacity (Grey)80 gal
  • Slideouts5
  • Tow/Hitch Weight2825 lbs

Email Seller

Request More Info on this 2026 Forest River Sandpiper 3990FL Offered for sale by Gillette's Interstate RV
Gillette's Interstate RV
Gillette's Interstate RV

7210 East Saginaw Street
Haslett, MI 48823

Phone: Click to Call

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New 2026 Forest River Sandpiper 3990FL available in Haslett, Michigan