When expanding a pickup’s range or supporting work fleets, gravity-fed auxiliary fuel tanks offer a simple, reliable way to store and dispense fuel. This guide reviews top gravity feed fuel tanks designed for truck beds, focusing on capacity, durability, and compatibility. Explore options from trusted brands, and compare installation considerations to find the right fit for your diesel or gasoline needs.
| Product | Brand | Capacity | |
|---|---|---|---|
| RDS MFG INC Fuel Tank – 60-Gallon | RDS MFG INC | 60 gallons | Top-siphon option with electric pump; fits some short beds |
| RDS MFG INC 72771 Fuel Tank | RDS MFG INC | Unknown capacity (lash) | Locking cap; aluminum, rust-resistant |
| Auxiliary Fuel Tank Install Kit Diesel Installation Kit (Diesel) | RALZAOTO | Kit for gravity-fed setup | Includes install hardware; 1 1/2″ fill line |
| 11025 1 1/2″ Diesel Installation Kit | nipponAsia | Kit for diesel systems | Designed to work with 3/8″ drain; compatibility noted |
| RDS MFG INC Rectangular Auxiliary Fuel Tank – 69 Gallon | RDS MFG INC | 69 gallons | Gasoline auxiliary fueling via top siphon; dimensions listed |
RDS MFG INC Fuel Tank — 60 Gallon
The RDS MFG INC 60-gallon auxiliary tank is part of a broad line of tanks designed for multiple fleet setups. It supports gasoline fueling via top siphon using an electric pump, which can help extend range for trucks used in remote or job-site conditions. It’s designed to fit certain short-bed configurations, so measurement before ordering is advised to ensure a clean fit. The aluminum construction can contribute to corrosion resistance and durability in typical truck bed environments. The tank’s versatility makes it a solid option for workloads that require portable fuel storage with straightforward dispensing.
RDS MFG INC Rectangular Auxiliary Fuel Tank — 69 Gallon
RDS MFG INC’s 69-gallon rectangular auxiliary tank is designed to provide a substantial gravity-fed fuel supply for extended hauling or off-road work. The package highlights that gasoline fueling is allowed when siphoned from the top via an electric pump. With dimensions listed for installation planning, this tank is positioned as a robust option for operators needing a larger capacity without compromising space in the bed area. The aluminum construction emphasizes rust resistance and long life in demanding environments.
RDS MFG INC 72771 Fuel Tank
The RDS MFG INC 72771 variant emphasizes a locking automotive-style fill cap and exterior-oriented design. The aluminum construction reduces corrosion risk, making it suitable for outdoor installations on trucks that operate in varying climates. This model’s emphasis on exterior placement and secure fill protection can be advantageous for fleets needing reliable fueling access while safeguarding against tampering or weather exposure. Always verify alignment with your vehicle bed measurements before purchase.
Auxiliary Fuel Tank Install Kit Diesel Installation Kit
This install kit from RALZAOTO is designed to enable a stable gravity fuel supply from an auxiliary tank to the OE system. The kit uses high-quality aluminum and rubber to resist corrosion and support longevity. It targets diesel engines and lists compatibility notes for Ford, Chevy/GMC, and Dodge models across a wide range of years. Installation ease and a clear part number (OE 11025) help with ordering accuracy. For users upgrading a vehicle’s auxiliary fueling setup, this kit can be a practical component of a gravity-fed system.
11025 1 1/2″ Diesel Installation Kit
The 11025 diesel installation kit is tailored for diesel applications and is designed to work with gravity-fed auxiliary tanks that have a 1½” fill line. It includes components compatible with older Ford and Dodge models and newer Chevy/GMC configurations. The kit’s focus on a robust drain interface and compatibility notes makes it a practical addition for those building or upgrading gravity-fed fuel systems, especially when matching with diesel engines and specific vehicle generations.
Buying Guide: Key Considerations for Gravity Feed Fuel Tanks
- Capacity and space: Choose a tank that matches your typical range needs without overloading the bed space. Larger tanks extend range but require careful bed measurement and mounting solutions.
- Fuel type compatibility: Confirm whether the tank supports gasoline, diesel, or both. Some models specify gasoline fueling via top siphon, while others target diesel installations.
- Material and corrosion resistance: Aluminum and iron have different weight, corrosion, and cleaning profiles. Aluminum tanks resist rust in many environments, while iron tanks may offer strength advantages and weight considerations.
- Mounting and fitment: Many tanks are designed for specific bed lengths (short vs. long). Check overall dimensions, mounting points, and any interference with steps, airbags, or other bed-mounted accessories.
- Fill line and siphon setup: Gravity-fed systems rely on a proper fill line and reliable siphon or pump arrangement. Ensure compatibility with your selected installation kit and top-filling arrangement.
- Security and caps: Tanks with locking caps or secure fill designs help prevent tampering and reduce venting issues in outdoor environments.
- Installation complexity: Some options require professional installation or specific hardware. Review included components and part numbers to avoid incompatible choices.
- Maintenance and cleaning: Routine inspection of hoses, fittings, and seals minimizes leakage and maintains steady fuel flow. Consider ease of access for cleaning and service.
- Compliance and safety: Verify that the setup complies with local regulations for auxiliary fuel systems, especially when mounting on commercial vehicles or fleets.
The selections reviewed here cover a range of capacities and configurations to support gravity-fed fuel needs in truck beds. When evaluating options, prioritize bed compatibility, fuel type, mounting options, and long-term maintenance. The right combination delivers reliable fueling for extended trips or demanding workloads while maintaining system integrity and vehicle compatibility.