bernz-o-matic torch head connections

[ScoH]

Greetings,

I'm planning to make my first propane cannon. I've seen 3 options for connecting a bernz-o-matic torch head (yes, cut off below the bend) to the rest of the fuel injection system, and was wondering which method is best and why?

1.
http://www.burntlatke.com says to thread the cut-off torch head with a 1/8" NPT die

2.
http://www.advancedspuds.com/propane.htm says a 7/16" compression to 1/4" male pipe fitting will work (see http://www.plumbingsupply.com/compress.html under "OD Comp x Mips adapter")

3.
I've seen plenty of people just using one or two small screw clamps connecting the cut-off (below the bend or not) torch head to a pressure-rated hose (those silver ones)

Also, are flared fittings necessary for any part? Or can I just use regular flare-less plumbing connections for everything?

Thanks very much,
- ScoH

[saladtossser]

#2, solid and safe

[sgort87]

(Copied and pasted from one of my posts on Spudtech.)

Personally, I like these because they only cost $8 and require no other fittings to get from propane to NPT.
<img src="https://images.truserv.com/imageserver/ ... mageType=1">
I bet most of you have them at your hardware store and have never noticed them. They are usually far from where we usually venture.

[Benny]

i always use the way where you shove the hose over the torch head with a hose clamp.

[ScoH]

Yes, that's what I've been looking for. Do you know what the exact name is, of that piece in the picture above? Or do you have the serial number for a store?

And what about flared fittings?

Thanks