New 2026 Forest River RV Sandpiper 3990FL

Standard Features (2026)

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
• 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
• Upgraded aluminum rims
• Oversized friction hinge entry door with extended latch (Main Entry) 
• Exterior LP Quick Connect

Interior 

• Solid Surface Kitchen Counter tops
• Fiberglass one-piece shower
• Washer and Dryer Prep
• 7’ slide-out height (Main Slides)
• Stainless steel kitchen package
• Beachside Sundance Congoleum 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" flatscreen smart TV (65” 3900HBLR)
• JBL Aura Cube FM/Bluetooth media center
• Designer window treatment
• Ceiling fan
• Tri-fold hide-a-bed sofa
• Quilted bedspread
• Prepped for inverter

Appliances/Systems

• Dual ducted 15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C
• AIRDIRECT® Air Vents for improved efficiency 
• 16 cu. ft. 12V refrigerator
• 60,000BTU On Demand Tankless Water Heater
• 40,000BTU furnace
• Heated Holding Tanks (12V)
• Floor ducted 40,000BTU 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)

Construction

• 5/8" tongue and groove DryMax® OSB 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

• Two chairs in place of ottoman bench
• Cordless vacuum
• Slide room awnings (N/A dinette slides)
• Washer and Dryer (Standard on 3800RK & 3900HBLR) 
• Dual pane windows (N/A 3900HBLR 84” Window) 
• 3rd A/C power saver direct dump system w/ wall thermostat

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.