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New 2026 Forest River RV Sandpiper 3990FL

Opelika, AL Stock #OP048422 ● New VIN: 4X4FSAS29TJ048422 Fifth Wheel Forest River RV
New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL New 2026 Forest River RV Sandpiper 3990FL
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Quick Specifications

8
Sleeps
12,439
Dry Weight (lbs)
43
Length (ft)
50
Fresh Water (gal)

Can My Vehicle Tow This RV?

This RV has a GVWR of 15,375 lbs. Use our free towing guide to check your truck or SUV.

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Forest River Sandpiper fifth wheel 3990FL highlights:

  • Shower with a Seat
  • Outside Storage
  • Theater Seating
  • Kitchen Island
  • Upper Loft

 

Wow! Check out this fifth wheel with a full loft for the little ones with two bunk mats, two wardrobe bookcases and a wardrobe/cabinet for ample storage. The main floor includes five slides for maximum space, a front living area with dual hide-a-bed sofas, plus an entertainment center with a 50" flat screen TV for movie nights! Once your guests have converted the living room to their bedroom at night, you can take the rear private bedroom. There is a king bed slide out here, a wardrobe, plus a closet with washer and dryer prep for full-time living. The full bath is easily accessible for everyone, and the middle kitchen will be a favorite with the chef of your group. Here, you'll find a 12V refrigerator, an island, tons of counter space, plus a hutch to display nice dishes, and a pantry for dry goods. Don't let this fifth wheel slip away!

 

You will find the perfect balance of size, space, features, and luxury with any one of these Forest River Sandpiper fifth wheels! They are constructed with a welded aluminum framed vacuum bonded laminated superstructure, a cambered powder coated frame with rust prohibitor, and a fully enclosed underbelly for added protection against the elements. The large tinted windows come with a 80/20 UV prohibitor or you can choose the optional dual pane windows. Some hassle-free amenities include a 60k BTU on-demand water heater, full coach water filter system, tire pressure monitor system, and an electric leveling system! Inside, you'll enjoy stainless steel appliances, solid surface countertops, Beachside Sundance linoleum, recessed residential lighting, and many more comforts!

Key Highlights

Sleeps
8 People
Slide Outs
5
Furnace
40,000 BTU
Awnings
1

Standard Features

Front Entertainment Front Living Kitchen Island Loft Rear Bedroom

Dimensions

Overall Length
43' 6"
Exterior Width
8'
Exterior Height
13' 4"

Weights

Dry Weight
12,439 lbs
GVWR
15,375 lbs
Hitch Weight
2,825 lbs
Payload
2,936 lbs

Tank Capacities

Fresh Water
50 gal
Gray Water
80 gal
Black Water
50 gal

Living Capacity

Sleeps
8 People
Slide Outs
5
Awnings
1

Climate Systems

Furnace
40,000 BTU

Appliances

Refrigerator
12V Stainless
Cooktop
3 Burner
Washer/Dryer
Full Unit
Shower
Shower w/Seat

Axles & Tires

Axles
2
Tire Size
16"

Additional Specifications

Tv Info
LR 50" Flat Screen TV
New 2026 Forest River RV Sandpiper 3990FL floorplan layout
Our Price
$69,777
MSRP: $104,176
You Save $34,399
Est. Monthly Payment
$498/mo
20 yr · 7.99% APR · 15% down
* Estimated payment with approved credit. Tax, title, and license extra.
Stock #
OP048422
Condition
New
Year
2026
Manufacturer
Forest River RV
Brand
Sandpiper
Model
3990FL
Category
Recreational Vehicles
Type
Fifth Wheel
VIN
4X4FSAS29TJ048422
Location
Opelika, AL
In Stock & Ready
Available for immediate delivery or pickup.

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