WT3881 – 40-Gallon Fresh Water Tank for RVs, Travel Trailers & Campers
Boost your RV’s water storage or replace a damaged tank with the WT3881 Fresh Water Tank—a rugged, 40-gallon tank built for Fifth Wheels, travel trailers, and campers. Its roto-molded, one-piece polyethylene construction ensures lasting durability and a leak-resistant design.
Perfect for select Forest River, Coachmen, and other popular RV brands, this tank features pre-positioned fittings for quick, factory-style installation.
Key Features:
-
💧 40-Gallon Fresh Water Capacity
Designed for extended off-grid travel or full-time RV living. -
Roto-Molded One-Piece Construction
Seamless, impact-resistant build reduces the risk of leaks or structural failure over time. -
🔧 OEM-Compatible Fit
Features factory-positioned fittings for easy replacement in Forest River, Coachmen, and other models. -
✅ Spin-Welded Components
Durable connections that hold up under pressure and vibration.
Specifications:
- Dimensions: 57" x 29 3/4" x 5 3/4"
- Capacity: 40 gallons
- Color: White
- Material: Roto-molded polyethylene
- Construction: One-piece with spin-welded fittings
- Compatibility: Forest River, Coachmen, and select RV models
Whether you're increasing your fresh water supply or replacing a worn-out OEM tank, the WT3881 offers the durability, fit, and performance you can count on from ICON.
Width: 62.79" (1595mm)
Crossbar Length: 62.40" (1585mm)
130 HR Transit: 104.72" (266.0cm)
148 MR Transit: 132.3" (336.0cm)
148 HR Transit: 81.9" (308.0cm)
148 HR EXT Transit: 150.4" (382.0cm)
Lengths by Vehicle:
Internal Width: 62.22" (1555mm)
130 Transit: 49 lbs
148 Transit: 58 lbs
148 EXT Transit: 74 lbs

