Specs for 2026 Forest River - Sandpiper
Floorplan: 3990FL (Fifth Wheel)

Dimensions

Weights

Capacities

2026 Forest River Sandpiper RVs for Sale Near You

Exterior

Electrical

Features

EXTERIOR FEATURES:
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 FEATURES:
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 
50" flatscreen smart TV
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 drawer 
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/CO gas detector 
Fire escape windows