lol.. i know how it feels... now your gonna ba asking all sorts of ?'s trying to get advice to make your gun better... oh and to all of you out there you can mix abs with pvc... its virtually the same material just differnt color... the abs just has tiny bubble whipped into it to make it lighter th...

Sorry good point. 3" chamber and yes pressure rated PVC, but can't remember the psi off the top of my head.

The only way i could see the barrel becoming the weak link is if some how the projectile gets logged in the barrel, but then again pressure would drop due to the expanded volume size.

I am building my second launcher. It is another pneumatic. The chamber consists of a end cap and a sleeve that actually but up to one another, so the entire chamber is double walled. What kind of pressure would be safe to go up to? Normally I would install a 125psi safety valve. But was thinking may...

I don't see why it would not work. Looks like a pretty good deal. I say go for it. But remember you get what you paid for it. I have bought stuff from Harbor Freight in the past. The prices are great but their stuff can be cheaply made, typically from China. But for less than $10, not a bad deal.

I am filling the hole that once housed the solenoid on my sprinkler valve. Do I need to just fill the top portion of the hole to seal it off or do I need to pack the epoxy all the way down into the bottom of the solenoid hole to plug the tooth pick sized holes at the bottom?

Thanks in advance

WOW!! wrote:

MrPotatoHead wrote:Does the "push valve" release the air from the sprinkler valve just as fast as the air tool type?

Do you mean a blow gun? Well, the size of a blowgun threads is 1/4 NPT and the push valves are............I will let you figure it out.

Wasn't sure if the exhaust was reduced in size.

Does the "push valve" release the air from the sprinkler valve just as fast as the air tool type?

Don't go into court assuming all will be fine. The ATF doesn't define these as destructive devices, but that doesn't mean that your local government or even state doesn't define them as destructive devices. LAWYER UP. Seek legal advice in your area. Look up the penal code for which you were charged....

Thanks for the suggestions guys. I will pull it appart tonight. Does caution need to be taken when filling the orafice that the solenoid once occupied? I filled it with JB Weld. Was I not supposed to pack it deep into the orafice? Would that affect the equalization of the pressure to the opposite si...

Leak is internal .......... it leaks out the end of the barrel. The valve is not sealing properly.

Built my first cannon this past weekend. It works great other than the fact that the Sprinkler Valve leaks. When I put air into it from 0-20psi it leaks pretty fast but when I take it up to around 60psi it seems as if it leaks slower. Did I screw up when I added JB weld to the oriface that housed th...

I take it not a lot of pressure builds up in this portion of the sprinkler valve.

I am building my first cannon and am building a pneumatic. I am using a 1" sprinkler valve. I am going to modify it by drilling it and adding an air tool. I would assume I need to plug the hole that originally had the solenoid in it. Is this correct and if so, what should I plug it with?

LucyInTheSky wrote:Good idea, you could use 1.5" SDR21 as the barrel and 2" sch80 as the rocket.

Isn't 1.5" SDR21 too thin to use alone as the barrel? And if so as the rocket moves forward exposing the SDR21, wouldn't the SDR21 then explode?

I have seen many different types of ammo including pvc rockets. Has anyone tried making a pvc rocket that would fit snuggly to the oustside of the barrel. In other words find a pvc pipe size that just fits in side another and use that as the barrel and the other as the rocket, so that the rocket rid...