Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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noname
- First Sergeant 4

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- Joined: Mon Apr 10, 2006 9:19 pm
- Location: Bay Area, CA
Sun Oct 29, 2006 3:39 pm
I wouldn't go over 80 psi with that, with all the DWV that's there. And where have I seen that red and black paint before?

It's not painted the same way though. Oh well, I still had to say that.
And this is semi/full auto how? What kind of loading system is there?
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joannaardway
- Corporal 5

- Posts: 949
- Joined: Mon Oct 09, 2006 4:57 pm
- Location: SW Hertfordshire, England, UK.
Mon Oct 30, 2006 7:35 am
Sorry to say it, but aren't some/most of those fittings DWV?
And it looks to me as if the sprinkler valve is on the wrong way round, but I don't know which way it's meant to fit on to your launcher. I'm probably wrong about this bit anyway.
It's very nice, I'm just confused.
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noname
- First Sergeant 4

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- Location: Bay Area, CA
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joannaardway
- Corporal 5

- Posts: 949
- Joined: Mon Oct 09, 2006 4:57 pm
- Location: SW Hertfordshire, England, UK.
Tue Oct 31, 2006 6:31 am
Ah. Damn - second page that I didn't see.
Whatever. At least I can recognise the DWV stuff now (not that it ever matters to me.)
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THEMOST
- Private 4

- Posts: 89
- Joined: Fri Oct 06, 2006 6:04 pm
- Location: Midland, MI
Wed Nov 01, 2006 8:20 pm
uhh it's kinda funny asking whats on my own gun. What's DWV?

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noname
- First Sergeant 4

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- Location: Bay Area, CA
Wed Nov 01, 2006 9:48 pm
It's the "crazy" PVC. The Ys and weird sized joints with really short socket depths.
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Attachments
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- The things are circled that are DWV.
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ProfessorAmadeus
- Sergeant

- Posts: 1046
- Joined: Fri Apr 28, 2006 5:39 pm
- Location: texas
Wed Nov 01, 2006 9:51 pm
The cannon looks cool but next time look for pressure rated stuff because the real fun starts when you take it over 100 psi

Insomniac wrote:Hey why am I a goose???? Why not somthing a little more awe inspireing, like an eagle or something? LOL
SOO CUTE!! OMG!! I COULD JUST LICK YOU!!
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kyle1292
- Private 4

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- Location: Chicago
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Contact:
Thu Nov 02, 2006 9:10 pm
yea i was wondering that for a while too thx for the info
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SpudStuff
- Sergeant 5

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- Location: Cupertino, California
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Contact:
Thu Nov 02, 2006 9:14 pm
Usually Sch 80 fittings look like the DWV except your wallet knows when you but SCH 80.
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THEMOST
- Private 4

- Posts: 89
- Joined: Fri Oct 06, 2006 6:04 pm
- Location: Midland, MI
Fri Nov 03, 2006 8:13 am
I've taken another one that I made over 120psi and I cracked a rubbermade trashcan with a paintball. Im not able to take it over like 140 because of the valve. It can only handle 150psi of H20 blast pressure. Air would go faster so I would use like 135psi otherwise it could break the valve. I m not worried about the fittings, the smaller ones have higher psi ratings, like 600psi.
Wait, what are the pressure ratings for DWV?
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potatoflinger
- Sergeant 2

- Posts: 1136
- Joined: Thu Nov 02, 2006 3:26 pm
- Location: Maryland
Fri Nov 03, 2006 9:51 am
If i were you, i would not use the co2 for the gun, but you can find a person that will fill up your co2 tank with air, that way it is not cold, but it is still in the same size container.
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joannaardway
- Corporal 5

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- Location: SW Hertfordshire, England, UK.
Fri Nov 03, 2006 10:54 am
DWV pipe and fittings are never rated, unless stamped as such.
Some pipe is odd in that it is listed as DWV, but has a rating of about 260 psi or so.
However, your fittings wouldn't have been rated. It might have taken about 100 psi without too much risk.
However, I am not in any way promoting you doing that. If you do that and end up with PVC nose and tongue piercings, I will not be held responsible. I am suggesting that it might be possible if done and checked carefully.
The cold from CO2 isn't really a problem if it has been injected fairly slowly - that causes less temperature drop.
CO2 is perfectly safe to use if correctly done. The biggest risk is accidentally missetting your regulator and your joints failing with excess pressure.
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THEMOST
- Private 4

- Posts: 89
- Joined: Fri Oct 06, 2006 6:04 pm
- Location: Midland, MI
Fri Nov 03, 2006 4:16 pm
joannaardway, so with a remote coil and a high pressure ball valve it would be completely safe?
This is the idea that I was going to use. It goes: CO2 tank --->remote coil--->ball valve--->PVC tank. Im not sure if Id put another ball valve in just for safty or not though.
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noname
- First Sergeant 4

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- Location: Bay Area, CA
Fri Nov 03, 2006 9:06 pm
Put another one in. Open the first one like on a propane meter, close it, open the one closer to the tank, close it, and keep adding smaller amounts that way. It won't be as cold and you'll be safe.