New 2026 Forest River RV Sandpiper 3990FL

Standard Features

Exterior

• 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
• GoPower 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
• TST Tire Pressure Monitoring System
• Enclosed and heated dump valves
• 16" Spare tire kit
• 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
• Upgraded aluminum rims
• Oversized friction hinge entry door
• Exterior LP Quick Connect with Grill/Griddle Cooktop

Interior 

• Solid Surface Kitchen Counter tops
• Fiberglass one-piece shower with folding teak seat
• Washer and Dryer Prep
• 6' 4" slide-out height
• Stainless steel kitchen package
• Beachside sundance linoleum
• Hidden hinged, soft close drawers and cabinets
• Full extension ball bearing drawer guides
• Stainless steel under mounted kitchen sink
• Trash receptacle in kitchen
• Decorative backsplash
• Two color coordinated interiors
• LED lighting throughout
• Recessed residential lighting
• Accent lighting over dinette
• Extra large, panoramic picture windows throughout
• Vented side windows in slide-outs
• TV antenna with booster
• Solid wood drawer fronts with birch sides
• Solid wood, square inset cabinet doors, painted or wood grain
• Bedroom slide-out fascia
• Memory foam mattress
• Teddy Bear® bunk mats
• 50" flat screen smart TV
• JBL Aura Cube FM/Bluetooth media center
• Designer window treatment
• Ceiling fan
• Tri-fold hide-a-bed sofa
• Quilted bedspread

Appliances/Systems

• Dual ducted 15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C
• 17 cu. ft. 12V refrigerator
• 60,000 BTU On Demand Tankless Water Heater
• 40,000 BTU furnace
• Heated Holding Tanks (12V)
• Floor ducted 40,000 BTU furnace
• 30" OTR stainless steel microwave
• Chef collection 3 burner / 24" oven with drawers
• Interior monitor panel for holding tanks
• Satellite and cable hookup with RG-6 cable for high quality picture
• Porcelain foot flush toilet(s)
• 65 Amp converter
• Power fan in Kitchen and Bathroom(s)
• Full coach water filtration system

Construction

• Welded aluminum-framed, vacuum bonded laminated superstructure
• 5/8" tongue and groove plywood floor decking
• 2 x 3 floor joists, 12" on center
• Laminated sidewalls
• 3/8" roof decking (Full walk-on roof)
• Cambered powder coated frame with rust prohibitor
• Underbelly armor
• 5" truss roof rafters
• R-10, 2" sidewall construction
• Laminated slide-out walls

For Your Safety

• Smoke alarm
• Fire extinguisher
• Breakaway switch (Battery hook-up required)
• Dead-bolt lock on entry door
• LP/CO2 gas detector
• Fire escape windows

Popular Options

• Free Standing Dinette in place of Booth (3550BH only)
• Two chairs in place of ottoman bench
• Central vacuum
• Slide room awnings (N/A dinette slides)
• Washer and Dryer

Polar Tech Package (Optional)

• Dual pane windows
• 3rd AC power saver direct dump system w/ wall thermostat

Summit Package 

• Electric Auto Leveling System
• Goodyear Tires with 7,000 lb. axles
• 2" Rear Receiver Hitch and 4-Pin Connector (Where Available) (NA 4002FB and 3990FL)
• Two 15,000BTU Air Conditioners
• Power fan in Kitchen and Bathroom(s)
• Anti-lock Braking System
• Tire Pressure Monitoring System
• 60,000 BTU On Demand Tankless Water Heater
• BoonDocker Solar System-200W Panel with controller & battery
• MORryde Steps with Strut (Where Available)
• Heated and Enclosed Holding Tanks (12V pads)
• Washer and Dryer Prep
• King Wi-Fi Extender System and Olympus Antenna
• Underbelly Armor
• Soft Close Residential Drawers & Cabinets Throughout
• 50" Flat Screen smart TV
• 4 Camera Security Prep with Back-Up Camera prep
• Full Coach Water Filter System
• Enclosed, One-Piece Docking Station
• Color Matched Gel coated Fiberglass Exterior
• Aerodynamic Two Tone Fiberglass Painted Front Cap with Lights
• High Efficiency Radiant Foil (Roof and Floor)
• Spare Tire

Chef's Kitchen Package (Standard)

• 16 cu. ft. Stainless Refrigerator (12V)
• Stainless Range with Cast Iron Grates
• Solid Surface Countertops
• Stainless Apron Sink with Strainer
• Commercial Style Kitchen Faucet
• 30" Over-the-Range Stainless Microwave
• Countertop Extension
• Designer Backsplash

See us for a complete list of features and available options!

All standard features and specifications are subject to change.

All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.

Due to the current environment, our features and options are subject to change due to material availability.