Gas line fitting

[Russell Reay]

Am building a carburetor test stand out of shop scraps, and need to fab a gas line . I went to the hardware store where they have (almost) every fitting known to man, but could not find this one. What is the correct name for this fitting?

 

[Fhane]

Try a Model A parts vender. Hardware stores do not carry Model A parts

 

[1955cj5]

compression fitting and ferrule...

 

[Russell Reay]

Try a Model A parts vender. Hardware stores do not carry Model A parts

I see that they all carry the fittings, and they call them 'gas line fittings'. The huge selection of compression fittings in the hdwr store all had female threads, no male threads, except for connectors. If this is fairly unique to Model As, I am happy to buy from our faithful vendors, but I am hoping to walk in, find the correct little plastic drawer, and walk out with the fitting.

 

[JoeCB]

Try an auto parts store.. should have it
Joe B

 

[Flathead]

I think they used to have these fittings but no demand nowadays so they are gone.

 

[JayJay]

When a hardware store has "gas line fittings" they are most likely for natural gas (as in water heaters and stoves), not gasoline. Auto parts store, as suggested, for fuel line fittings. I don't recall but the inlet to a Zenith might be standard tubing compression fittings as 1955cj5 says. Those might be available at your local hardware store.

 

[OLDMANKOHOUT]

FUEL LINE BRASS FITTING LARGER 9/16 INCH HEAD 1/2-20unf 1928-31

 

[CT Jack]

In your second photo the ferrule is located too far inward from the tip of the tube. It should be approximately 1/8" in from the tip.

 

[Keith]

The only place I was able to find this fitting is through the Model A suppliers,

 

[Russell Reay]

In your second photo the ferrule is located too far inward from the tip of the tube. It should be approximately 1/8" in from the tip.

I saw a related note in the red book, and have taken care of it.

 

[1928Mik]

McMaster-Carr is a good source for all kinds of fittings:


https://www.mcmaster.com/products/f...embly-compression-fittings-for-copper-tubing/

 

[Chuck Sea/Tac]

You need a better hardware store!

 

[Y-Blockhead]

The only place I was able to find this fitting is through the Model A suppliers,

Snyder's even has oversize ferrels if you have a stuborn leaks.

https://www.snydersantiqueauto.com/product.htm?pid=979363&cat=41707

 

[Flathead]

That oversize ferrule is very useful.

 

[JoeCB]

Just a little hint that may be useful... if you have a problem with a leaking compression fitting. First sweat solder the ferrule to the tube before tightening the fitting. With the normal application the "nut" must compress both the ID and OD of the ferrule to form a seal. Pre - soldering the ferrule ensures no leak on the ID side and much less compressive force required.
Joe B

 

[Fullraceflathead]

That's a great idea JoeCB!!!

 

[Bob Bidonde]

This slide shows where the ferrule needs to be relative to the end of the tube.

 

[47topless]

A good source for fittings, fuel and brake lines, is your local junk yard, (er... I meant to say, "Automotive Recycling Center". Many yards still have an "old" section and would have these parts available. Even if you come up empty, spending a couple of hours cruising through an old junk yard, is a joyous thing.

 

[katy]

compression fitting and ferrule...

1/4"