How to Install a Truck Transfer Tank
This overview explains the decisions behind a transfer tank installation. It does not replace the instructions supplied with the tank, pump or vehicle. Hardware, hole sizes, tightening values, electrical requirements and clearances can vary by model.
Before Installation
Confirm that the selected tank is suitable for the truck, liquid and intended use. Review the vehicle payload, the tank's loaded weight and all applicable federal, state and local requirements. Gather the model-specific tank instructions, pump instructions and vehicle information before drilling or wiring.
- Park on a level surface, secure the vehicle and remove ignition sources.
- Empty and clean the bed so the tank can sit flat and be measured accurately.
- Inspect the tank, cap, fittings, mounting tabs and supplied hardware for shipping damage.
- Do not fill the tank before it is correctly installed and inspected.
- Do not weld, cut, drill into or intentionally pressurize the tank.
- Review installation instructions for additional warnings and considerations.
- Note: Transfer tanks are not compatible with drop-in bedliners.
Installation Overview
Follow all instructions provided by the transfer tank and pump manufacturers. Review any vehicle manufacturer mounting restrictions and recommendations.
- Choose the location. Position the tank where it can be mounted securely, leaving a minimum of ¼-inch clearance to the truck bed walls and any other equipment that may be mounted on the truck. Leave working room around the cap, pump and service points.
- Inspect below the bed. Before marking a hole, identify wiring, brake lines, fuel lines, structural members and other components under every proposed drilling point. Move the tank or choose another approved location if clearance is uncertain.
- Mark the mounting points. Use the integrated mounting tabs as the template. Keep the tank square to the bed and recheck all clearances before drilling.
- Remove the tank before drilling. Drill only the specified holes. Protect the truck finish and treat exposed metal according to vehicle and installation guidance.
- Install the isolation mounting. Rubber isolation bushings help absorb road vibration. Assemble the bushings, washers, bolts and locking hardware in the exact order shown in the instructions.
- Tighten the mounting hardware correctly. Do not crush the isolation bushings or distort the mounting tabs. Use only the published tightening or compression specification for the model.
- Install the dispensing components. Confirm that the pump, filter, hose, nozzle, fittings and electrical system are compatible with the liquid, tank connection and intended flow. Follow the pump manufacturer's grounding, fuse and wiring instructions.
- Complete the final inspection. Verify clearances, fastener security, cap operation, venting, hose routing and electrical protection. Add only a small amount of approved liquid for the initial verification of operation, then correct any issue before normal use.
Why the Redesigned Mounting System Matters
Integrated mounting tabs reduce separate stress points and simplify tank placement. Isolation bushings absorb road vibration between the steel tank and truck bed. Together, these features support tank life only when the hardware is assembled and tightened as directed. Overtightening can defeat the isolation system; under tightening can cause premature failure.
Pump and Hose Setup
The 2-inch NPT threaded neck supports a straightforward pump connection, but thread size alone does not establish full compatibility. Check thread type, pump flow, liquid approval, filter requirements, electrical demand and vent capacity. Route the hose away from sharp edges, hot surfaces, moving components and locations where cargo can crush it.
Final Installation Checklist
- Tank is secure and does not contact or rub the bed or other items mounted to the truck.
- Isolation components are present, correctly stacked and tightened to specification.
- All drilled locations are clear of vehicle components and protected from corrosion.
- Fill cap locks and the vent path is clear.
- Pump and filter are compatible with the liquid and tank.
- Electrical wiring is fused, protected and routed to the pump instructions.
- Fittings, hose and nozzle show no leakage during the initial test.
- Payload and axle-load calculations include the filled tank and all equipment.
After Installation
Inspect the system before every use and after the first loaded trip. Look for fastener movement, bushing compression, coating damage, leaks, loose fittings and hose abrasion. Stop using the tank if it moves, leaks or shows structural damage. Follow the model instructions for periodic inspection and maintenance.
Start with the Correct Model
Choose the tank configuration that fits your truck and download the model-specific instructions before installation.
Explore WEATHER GUARD Transfer Tanks