2026 Forest River Sandpiper 3990FL

NewFifth wheel|Stock #SP111|Located at Fife RV Center in Fife, WA
$79,999$124,106
Save $44,107

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!

Specifications

Length

43 ft 6 in

Dry weight

12,439 lbs

Sleeps

8 people

Slideouts

5

Unit features & options

  • Automatic Electric Level-Up System
  • 2" Towing and Accessory Hitch (Where Available)
  • 7,000lb axles with Anti-lock Braking System
  • Goodyear Radial Tires w/ anti-lock brakes
  • Lippert auto adjust brakes
  • Rich Solar 200W roof mounted solar panel with controller and battery
  • Quad MORryde step above with strut (Where Available)
  • Color matched high gloss gel coated colored exterior fiberglass
  • Painted two tone aerodynamic fiberglass front cap with improved turning radius
  • Underbelly Armor
  • Tire Pressure Monitoring System
  • Spare tire
  • Large, tinted windows with 80/20 UV prohibitor
  • Electric awning with LED light strip
  • Prepped for Lippert On-The-Go Ladder
  • Power front jacks with spring loaded pins
  • Automotive-style fender skirts
  • Hitch light
  • Porch light with interior switch
  • 30 lb. double LP tanks with auto change over
  • Rain gutters with extra long drip spouts (Prevents black streaking)
  • Insulated heavy duty slam lock baggage doors
  • Exterior foldable grab handle
  • Unobstructed pass through storage area

Full specifications

AC BTU30000 btu
Available BedsKing
Awning Info20' Electric with LED Light Strip
Axle Count2
Axle Weight7000 lbs
Black Water Capacity50 gals
Cargo Capacity2936 lbs
Cooktop Burners3
Dry Weight12439 lbs
Electrical Service65 amp
Ext Height13 ft 4 in
Ext Width8 ft
Fresh Water Capacity50 gals
Furnace BTU40000 btu
GVWR15375 lbs
Grey Water Capacity80 gals
Hitch Weight2825 lbs
Int Height7 ft
LP Tank Capacity30 lbs
Length43 ft 6 in
Number of Awnings1 ft
Number of LP Tanks2
Refrigerator Size16 cu ft
Refrigerator Type12V
Shower TypeStandard
Sleeps8
Slides5
TV InfoLR 50" Flat Screen Smart TV
Washer/Dryer AvailableYes
Water Heater TypeOn Demand Tankless

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2026 Sandpiper 3990FL

2026 Sandpiper 3990FL
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