Ford Transit 16 Gallon Undercarriage Water Tank

Maximize storage space in your Ford Transit with this 16-gallon undercarriage water tank, engineered to mount cleanly beneath the van for a low-profile, high-capacity water solution. Whether you're building a camper, mobile work van, or adventure rig, this tank offers a reliable way to carry fresh or grey water without sacrificing valuable interior space.

Key Features

Designed for the Ford Transit Undercarriage

Built specifically to fit the passenger-side slider door area, with the flexibility to mount on the driver side as well.
✔ Fits Transit Trail models equipped with factory running boards.

16-Gallon Capacity

Ideal for sinks, showers, grey water, or general off-grid water storage needs.

Safe, Food-Grade Materials

Constructed from BPA-free, food-grade polyethylene plastic—safe for potable water and durable enough for grey water applications.

Non-Pressurized System

Tank must be vented; not intended for pressurized setups.

Specifications

• Capacity: 16 gallons

• Dimensions: 46" L × 13" W × 8.5" H

• Material: BPA-free food-grade polyethylene

• Certification: IAPMO TS-4 Certified

Ports

• (2) × 1.5" NPT ports (rear-facing end)

• (2) × 1/2" NPT ports (rear-facing end)

• (1) × 1.5" NPT port on top

Installation Details

This kit includes everything needed to securely mount the tank under the van:
✔ (3) Stainless steel laser-cut mounting straps
✔ Stainless steel hardware
✔ 3/8" rivnuts

Installation Requirements

• Drill three 17/32" holes near the pinch weld for rivnuts

• Enlarge two existing hexagonal frame holes

• Use one factory bolt at the exhaust hanger location

• A rivnut tool is required (not included)

This setup ensures a strong, secure mount without affecting interior build space.

Why Choose This Undercarriage Water Tank?

The 16-gallon Transit undercarriage tank is engineered for optimal fitment and durability. By utilizing exterior space beneath the van, you gain additional water storage without sacrificing cabin room—perfect for van conversions focused on efficiency and comfort.