Install a manual fuel cut off valve in a steel fuel line?

[bikemaniac]

Hi,

I am about to replace all my steel lines:

Brake 3/16 inch
Clutch 1/4 inch
Fuel 5/16 inch
Fuel return 1/4 inch

to a corrosion resistant material, probably Nicopp. But I want to install a manual (not electric with a relay) fuel shut off valve (ball valve) for anti theft purposes on the forward 5/16 inch fuel line.

I envision a ball valve of this type:

https://static.grainger.com/rp/s/is/image/Grainger/21VL80_AW01?$mdmain$

either in 1/8 or 1/4 size.

The fuel system consists of:

One short piece of rubber fuel tube from the tank. This rubber tube is connected to the beforementioned steel 5/16 inch line which travels most of the way underneath the car. Just before the fuel filter, the steel line is connected to a piece of rubber tube again.

Question:

What is the best way to install such a valve in between the fuel line? I am especially interested in what fittings I should use for this application. Flare fittings, compression fittings, metric fittings (I live in Europe). I am very much confused by all the fitting types, but ideally I would like to go with the flare fittings - if there are adaptors/fittings that fit into the ball valve. Any ideas?

Lucas

 

[Notch]

Those types of valves are generally NPT thread and it's very easy to find NPT to 45 degree flare adapters which is a common adaptation in the US.

Personally, I would not bother with a mechanical fuel valve unless it's to aid in servicing the fuel system (which is almost never). You're adding five more places for leaks and adding some cost for a quality valve. A 5$ toggle switch is easier to use since it would not be under the truck. You could shut off one of MANY wires to prevent running.

 

[Dave 2000]

I too prefer cutting the supply to the fuel pump, but would be happy to use the electric solenoid type on a diesel.

Regards

Dave