Chassis & Towing
12,439 lbs Dry Weight
Designed for easy towing with a variety of vehicles.
2026 Forest River Sandpiper 3990FL
1 / 52
1 / 52
1 / 52
Layout & Media
Explore the floorplan, 3D tour
Complete Fifth Wheel Specifications
2026 Forest River Sandpiper Overview
The 2026 Forest River Sandpiper 3990FL is designed for families looking for spacious comfort on the road. With a length of 44 ft and the ability to sleep up to 8 people, this new fifth wheel is perfect for family gatherings or adventurous trips. Enjoy the convenience of a kitchen island and a well-appointed living area located at the front, ensuring everyone can relax together. This model features 5 slides for expanded living space and is equipped with a tankless water heater to ensure hot water on demand. Solar-ready and washer dryer prep make it ideal for extended travels. Schedule your tour today at our Fife, WA location and explore this exceptional fifth wheel!
Premium Features & Highlights
Spacious living area with 5 slides for extra room
Tankless water heater for continuous hot water
Solar ready for off-grid adventures
Kitchen island for convenient meal preparation
Bunkhouse layout sleeps 8 comfortably
Select a category to view specs
Overview
Vehicle Identification & Details
8 specifications available
- Category
- Fifth Wheel
- Condition
- new
- Floorplan
- 3990FL
- Make
- Forest River
- Model
- Sandpiper
- Stock Number
- SP111
- VIN
- 4X4FSAS21TJ049192
- Year
- 2026
Size & Weight
Dimensions, Weight, Construction & Exterior
9 specifications available
- Dry Weight
- 12,439 lbs
- GVWR
- 15,375 lbs
- Length
- 43.5 ft
- Exterior Height
- 13.33 ft
- Width
- 8 ft
- Awning Length Ft
- 21 ft
- Awnings Count
- 1
- Slides
- 5
- Hitch Weight
- 2,825 lbs
Sleeping & Layout
Beds, Layout, Living & Comfort
10 specifications available
- Bedroom Count
- 1
- Bunkhouse
- Yes
- Full Beds Count
- 0
- King Beds Count
- 1
- Primary Bedroom Location
- Rear
- Murphy Beds Count
- 0
- Sleeps
- 8
- Interior Lighting
- LED
- Living Area Location
- Front
- U Shaped Dinette
- false
Kitchen & Dining
Cooking, Dining & Appliances
4 specifications available
- Kitchen Island
- Yes
- Refrigerator Power Mode
- 12V
- Refrigerator Size
- 16
- Washer Dryer Prep
- Yes
Bathroom & Facilities
Comfort & Privacy
2 specifications available
- Bathrooms Count
- 1
- Shower Type
- Standard
Water Systems
Tanks & Plumbing
4 specifications available
- Black Water Capacity
- 50 gal
- Fresh Water Capacity
- 50 gal
- Gray Water Capacity
- 80
- Has Tankless Water Heater
- Yes
Power & Electrical
Electrical, Entertainment & Safety
2 specifications available
- Solar Ready
- Yes
- Washer Dryer Prewiring
- Yes
Climate Control
Heating & Cooling
1 specifications available
- Heater Btu
- 60,000 BTU
Standard Features & Equipment
5/8" tongue and groove DryMax® OSB floor decking
2 x 3 floor joists, 12" on center
Smoke alarm
Fire extinguisher
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,
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,
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 (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, Teddy Bear® bunk mats,
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),
* Vehicle specifications listed to the best of our knowledge. All specifications, features, and information are provided by the manufacturer. Fife RV Center is not responsible for manufacturer defects, specification changes, or recalls. Buyers should verify all information directly with Fife RV Center.
Calculate Your RV Payment
Get your personalized RV payment options in 3 easy steps
PreferencesDetailsContactPayment
How much would you like to put down?
Choose your preferred down payment amount
Built to Last
Superior construction for years of adventures
Chassis & Towing
15,375 lbs GVWR
Robust build to support all your camping gear and essentials.
Ready for Your Next Adventure?
Experience the freedom of the open road with your next RV adventure
Payment Calculator
Estimate your monthly payments
from $575/mo
Estimated • 20% down
Schedule Tour
See this RV in person at our showroom
Showroom Hours
Mon-Sat: 8:30 AM - 6 PM, Sun: 10 AM - 5 PM
3410 Pacific Hwy E Fife, WA 98424
Trade-In Value
Get your current RV's value
Trade Evaluation
Dealer assessment
Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. We are not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us for availability as our inventory changes rapidly. All calculated payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available.
$80,649
est $575/mo