Pipe fitting help

A place for general potato gun questions and discussion.
Post Reply
whoa044
Private 4
Private 4
Posts: 79
Joined: Thu Sep 23, 2010 7:03 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.

Image

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

Thanks
Top
User avatar
Brian the brain
Moderator
Moderator
Netherlands
Posts: 3497
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Been thanked: 7 times

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..
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
Top
MRR
Specialist 3
Specialist 3
Posts: 361
Joined: Tue Feb 17, 2009 2:29 pm

Yea these hose barbs are hard to find, many people asked about it. Much easier to find are brass solder fittings.
Image
Top
User avatar
DYI
First Sergeant 5
First Sergeant 5
Antigua & Barbuda
Posts: 2862
Joined: Sat Jul 07, 2007 8:18 pm
Location: Here and there

That hose barb doesn't have a tapered pipe thread - it is a garden hose fitting, not a pipe fitting :wink:
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
Top
User avatar
FighterAce
Specialist 2
Specialist 2
Croatia
Posts: 295
Joined: Fri Oct 23, 2009 1:28 pm
Location: Croatia/Zagreb
Has thanked: 1 time
Been thanked: 4 times
Contact:
Contact FighterAce

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.
“The combined synergy of a man and rifle is matchless.
The steadiness of hand, the acuity of vision and finally
the art of knowing how to make the rifle an extension of the
body all equate to the ultimate synthesis of man and machine.”
Top
whoa044
Private 4
Private 4
Posts: 79
Joined: Thu Sep 23, 2010 7:03 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.
Top
User avatar
Fnord
First Sergeant 2
First Sergeant 2
Posts: 2239
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Been thanked: 1 time
Contact:
Contact Fnord

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.
Image
Top
User avatar
Crna Legija
First Sergeant 2
First Sergeant 2
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia

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

Image
'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
Top
Post Reply

Create an account or sign in to join the discussion

You need to be a member in order to post a reply

Create an account

Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute

Register

Sign in

  • Similar Topics
    Replies
    Views
    Last post

Return to “General Cannon Discussion”