Need to source odd air line fitting

true temper · Oct 27, 2018

My friend has a portable air tank with a regular looking male air fitting to fill it. But inside the fitting it has a Schrader valve in it. You just plug in the regular female coupler on hose and the tank fills, when full uncouple it and the Schrader acts like a check valve. I thought he was nuts when asking where to find some replacements as I have never seen one like it. I know some couplers will fit on valve stems, but this looked like a male coupler.

john.k · Oct 27, 2018

There are a million different types of airline couplings,every maker had his own design,which didnt fit any other.....Some were designed to be special ,for instance Clemco,breathing air.........then you can add in self sealing hydraulic couplings,and you get into the category of the dummys looking for manuals for early Taiwanese machines......dont exist,never did.

true temper · Oct 27, 2018

It looks like and fits a Milton M style coupler. https://www.miltonindustries.com/1-4-male-plug-m-style.html But has a Schrader valve in the end.

Toms Wheels · Oct 28, 2018

Go to a tire guy who handles big tires, wheel loader, off road trucks. The inner tubes use screw in fittings that have a schrader valve in them, then just tap a piece to fit the thread on the end of the adapter.

metalmagpie · Oct 28, 2018

How I plumbed my tank for spare air:
nipple straight up from tank to center leg of tee. One end of tee goes to quarter turn ball valve with air input on far end. Other end of tee is plumbed directly to a female air fitting.

To fill, attach air hose, then open valve. When whooshing slows, close valve.

I made up one of these from an old propane bottle. Holds air for a long time. I made it in '06 and still use it sometimes.

metalmagpie

true temper · Oct 28, 2018

I plumbed mine with a ball valve also, works great. My buddy I guess is lazy he don’t want to messs with valve. But more than any thing I have never seen a fitting like that, wondering if any one else have seen any thing like it.

Ziggy2 · Oct 28, 2018

true temper said:
I plumbed mine with a ball valve also, works great. My buddy I guess is lazy he don’t want to messs with valve. But more than any thing I have never seen a fitting like that, wondering if any one else have seen any thing like it.

It might just be a normal fitting with the valve added by someone. There are tools for repairing the threads so it could be used as a tap.

Gordon Heaton · Oct 28, 2018

true temper said:
My friend has a portable air tank with a regular looking male air fitting to fill it. But inside the fitting it has a Schrader valve. . .

What depresses the schrader valve? Just the air pressure? If so, I don't think you'd get a good fill since ordinary schraders require a lot of pressure to push open without a mechanical boost.

true temper · Oct 29, 2018

Ziggy2 said:
It might just be a normal fitting with the valve added by someone. There are tools for repairing the threads so it could be used as a tap.

I thought about that, but it needs a seat for the plastic gasket to set on.

true temper · Oct 29, 2018

Gordon Heaton said:
What depresses the schrader valve? Just the air pressure? If so, I don't think you'd get a good fill since ordinary schraders require a lot of pressure to push open without a mechanical boost.

I don’t have an answer for that, all I know is it works. I need to get a bettter look at it.

Cole2534 · Oct 29, 2018

Just use a piston check?

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Need to source odd air line fitting

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