RALZAOTO Auxiliary Diesel Fuel Tank Install Kit 11025 — 1.5" Gravity Valve, Aluminum/Rubber Corrosion-Resistant

RALZAOTO 11025 Auxiliary Fuel Tank Install Kit is a corrosion-resistant aluminum and rubber install kit that provides a stable gravity feed to an auxiliary diesel tank for compatible Ford, Chevy/GMC and Dodge trucks.

This install kit is engineered to connect an auxiliary diesel tank to your vehicle’s original equipment fuel system using a 1 1/2" gravity feed valve and durable fittings. Built from aluminum and rubber components, the kit resists corrosion and is intended to maintain a controlled fuel level between the OE tank and the auxiliary tank. Confirm OE part numbers 11025 or 011025 before purchase to ensure compatibility.

How does this kit let an auxiliary tank feed by gravity?

The kit includes a gravity-style fuel valve and fittings sized at 1 1/2" to allow fuel to flow from the vehicle’s OE tank into the auxiliary tank without an electric pump. It relies on proper installation and height placement of the tanks to maintain gravity feed and control fuel level automatically.

• Gravity fuel valve and connector sized for 1 1/2" diesel lines
• Aluminum fittings that resist corrosion and wear
• Rubber seals to prevent leaks and maintain a stable seal
• Designed to control fluid level from the OE tank to the auxiliary tank

Which vehicles and engines are compatible with part 11025?

This kit is made specifically for diesel engines and lists compatibility across many model years. It fits 1999–2024 Ford diesel trucks, 2011–2022 Chevy/GMC diesel trucks and 1999–2012 Dodge diesel trucks, but always verify your vehicle’s OE part number matches 11025 or 011025 before ordering.

• Compatible with diesel-engine Ford models from 1999 to 2024
• Compatible with Chevy and GMC diesels from 2011 to 2022
• Compatible with Dodge diesels from 1999 to 2012
• Check OEM part number 11025 / 011025 for an exact match

What materials and features ensure long service life?

The kit combines aluminum hardware with rubber components to balance strength and sealing performance. Aluminum resists rust and structural degradation, while rubber provides leak resistance where it matters most; the combination is chosen for longevity in fuel system environments.

• High-quality aluminum for corrosion resistance
• Durable rubber seals and grommets for leak control
• Designed for stable gravity fuel supply without extra pumps
• OE part number included to match factory specifications

Are there any installation tips to prevent spills?

Care during installation helps avoid fuel spillage and ensures the valve seats properly. Use a suitable tool to tighten the RDS fuel tank valve fully and double-check connections and clamps for a secure, leak-free fit.

• Use the recommended tool to fully close and seat the RDS valve
• Tighten clamps and fittings to manufacturer torque guidelines
• Verify correct tank heights for reliable gravity flow
• Inspect seals after initial use to confirm no leaks

Who is this for: The RALZAOTO 11025 Auxiliary Fuel Tank Install Kit is aimed at diesel truck owners, fleet operators, and installers who want a reliable, corrosion-resistant way to connect an auxiliary tank to a vehicle’s OE fuel system. It’s suitable for technicians familiar with fuel system installations and owners who can confirm OE part number compatibility before purchase. The kit ships as one complete set; contact RALZAOTO customer service for assistance or compatibility questions.