2026 Forest River Sandpiper 3990FL

New Fifth Wheel in Grand Rapids, Michigan, 49548

$70,999.00

New 2026 Forest River Sandpiper 3990FL available in Grand Rapids, Michigan

2026 Forest River Sandpiper 3990FL - New Fifth Wheel For Sale by TerryTown RV Superstore in Grand Rapids, Michigan

2026 Sandpiper 3990FL by Forest River from TerryTown RV Superstore in Grand Rapids, Michigan

Unit Specs

Stock #46228
Year2026
ManufacturerForest River
Make Forest River
ModelSandpiper
Floorplan3990FL
Type Fifth Wheel
ConditionNew
Length43' 6"
VIN4X4FSAS23TJ048657
Price $70,999.00
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Sleeps9
Water Capacity (Fresh)50 gal
Water Capacity (Black)50 gal
Water Capacity (Grey)80 gal
Slideouts5

Looking to buy a 2026 Forest River Sandpiper Fifth Wheel RV?

AI Generated Description Forest River Sandpiper 3990FL stands out with a GVWR of 15375 pounds and a length of 43.5 feet. Built with a robust chassis and premium interior finishes, it features a hitch weight of 2825 pounds and a dry weight of 12439 pounds. A generous capacity with Total Black Water Tank Capacity of 50 gallons and Total Gray Water Tank Capacity of 80 gallons ensures ready-to-go convenience, and hit the open road with confidence. View the Forest River Sandpiper at TerryTown RV.

This 2026 Forest River Sandpiper 3990FL is an RV the whole family will love. Ready to be a proud Forest River owner? This 2026 Forest River Sandpiper 3990FL is the perfect fit. This rig sleeps 9, so it makes the perfect family RV. This rig cuts no corners on space, expanding into a massive living area with 5 slides. If you’re thinking of heading off grid, this rig has a 50 fresh water tank.

2026 Forest River Sandpiper 3990FL Features

2026 Forest River Sandpiper 3990FL Specifications

Dimensions

Height

13' 4"

Length

43' 6"

Width

8' 0"

Weights

Dry Weight

12,439 lbs

GVWR

15,375 lbs

Hitch Weight

2,825 lbs

Payload Capacity

2,936 lbs

Capacities

Refrigerator Capacity

16 cu ft

Sleep Capacity

Water Capacity - Black

50 gal

Water Capacity - Fresh

50 gal

Water Capacity - Grey

80 gal

Exterior

# Awnings

# Axles

# Doors

# Slides

Hitch

Fifth Wheel

Electrical

# A/C

A/C Spec

15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C

*MFG Specs are for the base unit. Certain options may change specifications listed. Please consult dealer for more details. RVUSA.com cannot guarantee the accuracy of the data presented.