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Metal water bottle thread size?
Posted: Tue Nov 25, 2008 4:03 pm
by NatoHub
Do most metal water bottles have a common thread size for the cap (for use as an air chamber)? If so, what is it?
I'm looking to make something similar to this:
http://www.spudfiles.com/forums/viewtopic.php?t=15091&
Posted: Tue Nov 25, 2008 4:22 pm
by VH_man
If you look, I beleive that tank was JB-welded on.
Try the threads used on garden hoses. At the paintball place i was at last, I could thread it onto the hose spigot....... Sending me on a great way to get the dents out of the dang things.
Posted: Tue Nov 25, 2008 5:04 pm
by brplatz
Most likely it is a proprietary thread.
I used a old fire extinguisher bottle and it needed to be J-B Welded on.
Posted: Fri Nov 28, 2008 1:37 pm
by NatoHub
I've never messed with QEV's or homemade piston valves (I've made a modded sprinkler), but could I basically make the above cannon with a QEV replacing his homemade valve? Seems like it should work, but I want to know if I'm right before buying a QEV online.
Thanks
Posted: Mon Dec 01, 2008 11:36 pm
by NatoHub
Sorry to double post, but could anyone give me a quick answer? It's all I need to know to start buying parts. Thanks!
Posted: Tue Dec 02, 2008 12:02 am
by MrCrowley
NatoHub wrote:could I basically make the above cannon with a QEV replacing his homemade valve?
Yes.
Posted: Tue Dec 02, 2008 10:12 am
by mark.f
They are 3/4" Garden hose threads, I believe. Just buy an adapter to NPT for around 5 bucks.
EDIT:
Yup.