JDMSPEED Fuel Tank Selector Valve 3-Port FV1T/FV1 12V Inline Switch for Main/Aux Tanks

JDMSPEED's FV1T/FV1 3-port fuel selector valve lets you switch between main and auxiliary fuel tanks quickly and reliably on 12V vehicles.

Designed for vehicles that carry two separate fuel reservoirs, this compact inline switching valve installs between the fuel pump and tanks to route flow from either the main or auxiliary source. It works with gasoline or diesel systems that do not use fuel return lines and provides a cleaner, safer alternative to manual splicing or improvised fuel routing. Built for straightforward installation and dependable switching, the valve suits trucks, boats, generators, and custom dual-tank setups.

How does the valve fit into my vehicle's fuel system?

The FV1T/FV1 mounts inline between the fuel pump and the pair of tank feed lines, electrically selecting which tank supplies the engine. It operates on standard 12-volt vehicle electrical systems and does not require a return line, so it integrates with simple feed-only setups. Wiring and mounting points are sized for aftermarket installations and replacement projects.

• Installs on feed line between pump and twin tank outlets
• Operates on 12 V electrical systems common in cars, trucks, boats
• No return line required — ideal for gravity-feed or pump-only systems
• Compatible with both gasoline and diesel fuel types

Will this work with gasoline and diesel engines?

Yes — the valve's materials and seals are compatible with both gasoline and diesel fuels, making it versatile for mixed fleet use or repurposed equipment. Avoid using it with aggressive additives or fuels outside typical automotive formulations unless confirmed by the manufacturer. Routine inspection ensures long-term reliability when switching between fuels.

• Seals and body designed for gasoline and diesel compatibility
• Safe for standard automotive fuel blends and biodiesel up to common concentrations
• Not recommended for corrosive chemicals or nonfuel liquids
• Regular checks of fittings and hoses preserve performance

How reliable and easy is the installation and operation?

The FV1T/FV1 is engineered for straightforward wiring and plumbing, with clear inlet/outlet ports and a 12V actuator for quick switching. Installers typically mount the unit near the fuel pump or inline along the feed harness, secure electrical connections, and test for leaks before regular use. Operation is a simple toggle or switch action that directs flow from the chosen tank without manual hose changes.

• Quick 12V electrical actuator for instant switching
• Inline design simplifies plumbing and saves space
• Standard hose fittings accommodate common fuel line sizes
• Leak-checking after install ensures safe operation

What maintenance or precautions should I follow?

Maintain the valve like any fuel system component: inspect for leaks, check electrical connections, and clean or replace hoses as needed. Because it's installed between the pump and tanks, keep the surrounding area free of debris and avoid prolonged exposure to extreme heat. Follow vehicle and fuel system guidelines for safe handling and storage.

• Regularly inspect seals and hose clamps for tightness
• Keep wiring dry and secured to prevent chafing or shorts
• Check compatibility before using unconventional fuel blends
• Test switch function during routine vehicle checks

Who is this for: The JDMSPEED FV1T/FV1 3-port fuel selector is aimed at vehicle owners, fleet operators, and DIY mechanics who run main-plus-auxiliary tank configurations — including trucks, off-road rigs, marine craft, and stationary generators. It’s a practical solution for anyone needing a tidy, electrified method to choose fuel sources without modifying existing return-less systems. If you need a robust inline switching valve rated for both gasoline and diesel on a 12V platform, this unit provides a reliable, serviceable option that keeps fuel routing clean and controllable.