New 2026 Forest River RV Sandpiper 3990FL Fifth Wheel

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Options Added: 

Summit Package* 

RVIA Seal

Forest River Sandpiper fifth wheel 3990FL highlights:

• Outside Storage
• Theater Seating
• Kitchen Island
• Upper Loft

The perfect fifth wheel for a larger family! This unit sleeps eight people the loft above the rear master bedroom and bathroom. In the loft area, there are two 44" x 74" bunk mats for comfort as well as wardrobe/storage at the head of each. The master bedroom features a king size bed that slides out to create more space by the bed. A spacious bath features a one-piece fiberglass shower for comfort.  A spacious kitchen features two slides, a free-standing dinette in one, and the 12V refrigerator and stove in the other. There is also a center island with large sink for added food prep space. Head up the steps in front to a dual slide front living area with 50" TV and fireplace beneath the window. There is also theater seating opposite the TV, and a tri-fold hide-a-bed in each slide allowing added sleeping space when needed.

You will find the perfect balance of size, space, features, and luxury with any one of these Forest River Sandpiper fifth wheels! They have a cambered powder coated frame with rust prohibitor, and a fully enclosed underbelly for added protection against the elements. Also, the power front jacks with spring-loaded pins enhance the convenience, speed, and safety. The large, tinted windows come with a 80/20 UV prohibitors. Some hassle-free amenities include a 60k BTU on-demand water heater, porcelain foot flush toilet(s), tire pressure monitor system, and an electric leveling system! Inside, you'll enjoy stainless steel kitchen package, solid surface kitchen countertops, Beachside Sundance Congoleum linoleum, recessed residential lighting, and many more comforts!

A 5 year protection plan can be added to this camper for $3,490 or $29/mo*. Ask our team for details!

*Payments are based on 7.49% APR for 240/mo with no taxes included and 10% down for qualified applicants. SR1 does not believe in dealer fees. We provide the most transparent pricing in the industry. You will not be charged doc, prep, or destination fees. Please click "get financed" above, to submit an application. We will reply ASAP to the application. Price, information, and availability are subject to change at any time, therefore, information and specifications are not guaranteed. Terms may vary depending on applicants' residency.

*Manufacturer features may or may not apply to certain units and not others within the same brand and / or series. Please confirm what specific options, packages, and capabilities this specific RV has by calling or texting 207-622-0672.