Pipe fitting help

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whoa044
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Mon May 28, 2012 1:58 pm

I'm dying to know where I could find this type of hose barb, or what name it could possibly have. As of now, it's the only thing preventing the completion of my gun.

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The main difference between this hose barb and others, is that it lacks the hex portion, which you can see in the one below:
Image


Credit to MRR

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Brian the brain
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Mon May 28, 2012 3:37 pm

If the second one can easily be found I suggest filing off the hex and be done with it.

although the first one is a beauty..

Got to finish that gun one way or the other..
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MRR
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Mon May 28, 2012 3:48 pm

Yea these hose barbs are hard to find, many people asked about it. Much easier to find are brass solder fittings.
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DYI
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Mon May 28, 2012 4:37 pm

That hose barb doesn't have a tapered pipe thread - it is a garden hose fitting, not a pipe fitting :wink:
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FighterAce
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Mon May 28, 2012 4:54 pm

You could also press fit a female 3/8 connector into a male 3/4 connector. Make sure the 3/8 connector's body has exactly the same or a hair larger OD than the 3/4 ID.
Some sort of ridge or hexagonal part on one end of the 3/8 connector could be used to "anchor" it and also provide a larger surface area for the piston seal. Those solder fittings are so thin they will cut right through the rubber at higher pressure.
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whoa044
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Mon May 28, 2012 5:13 pm

Image
I've considered face bushings, with a number of washers stacked on it.

Kind of like this. Image
The washers would provide more area for the sealing gasket to press up against, and wouldn't require as long a piston.


My hopes are to run this valve up to 400 psi. Already made an epoxy piston and it seems like it would shatter if I used it at that pressure.
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Fnord
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Mon May 28, 2012 7:32 pm

Just find a short length of brass pipe and cut it to size, maybe? That's pretty much the standard way to do it, and would eliminate to washers.
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Crna Legija
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Tue May 29, 2012 3:12 am

i just solder a bit of copper pipe into a brass fitting.

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