New 2026 Forest River RV Sandpiper 3990FL Fifth Wheel

Virtual Tour
2026 3990FL Features and Options

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!

What Our Customers Are Saying

Went above and beyond!

Randy and Tim helped us out. We needed some new batteries on our trip from Indianapolis to Bend, OR. Not only did they get us the batteries, when we needed a new connection made they drove us down to the local Napa and got us back. Also stayed open an hour past closing to make sure we were good. - Dan
Price: $97,386
You Save: $15,391
Sale Price: $81,995
Owensboro RV
Location: Owensboro, KY
Stock# RV048863
To get help now on this RV, call and enter the RV ID if prompted.
RV ID: 3301420#
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2026 3990FL Specifications
Sleeps 8
Slides 5
Length 43 ft 6 in
Ext Width 8 ft
Ext Height 13 ft 4 in
Int Height 7 ft
Hitch Weight 2825 lbs
GVWR 15375 lbs
Dry Weight 12439 lbs
Cargo Capacity 2936 lbs
Fresh Water Capacity 50 gals
Grey Water Capacity 80 gals
Black Water Capacity 50 gals
Furnace BTU 40000 btu
Available Beds King
Refrigerator Type 12V
Refrigerator Size 16 cu ft
Cooktop Burners 3
Number of Awnings 1
Axle Weight 7000 lbs
LP Tank Capacity 30 lbs
Water Heater Type On Demand Tankless
AC BTU 30000 btu
TV Info LR 50" Flat Screen Smart TV
Awning Info 20' Electric with LED Light Strip
Axle Count 2
Washer/Dryer Available Yes
Number of LP Tanks 2
Shower Type Standard
Electrical Service 65 amp
VIN 4X4FSAS26TJ048863
For more information Contact Us

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