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Pvc Piping


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#1 Cankywanky

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Posted 23 December 2003 - 12:40 AM

When I went to the hardware store today i took a mega dart with me to compare it to the right size of pvc piping. I know that a mega dart fits in a 1/2 '' pipe but its really loose. Can anyone help me? The next size down piping holds it to tight and there wouldn't be enough pressure to push it out of the barrel. This is my first homemade by the way.

Edited by Cankywanky, 23 December 2003 - 12:41 AM.

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#2 cxwq

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Posted 23 December 2003 - 11:11 AM

How close is your FBR to 5/8" diameter?

It doesn't have to be too snug for a homemade because the air volume is typically more than adequate. If you hold a piece of 1/2" PVC vertically and plug the bottom end, the dart should very slowly drop through. If it falls quickly, there is too much air going around the dart.

SCH 40 PVC (dark gray) is slightly smaller ID than SCH 80 so if your darts are smaller than typical, you should try that.
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#3 Cankywanky

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Posted 23 December 2003 - 03:29 PM

i think its pritty much dead on 5/8. My dad kept on saying that it wouldnt work but we never dropped it down the tube to see if it would fall slowly.
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#4 Alexthebeast

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Posted 23 December 2003 - 04:39 PM

SCH 40 PVC (dark gray) is slightly smaller ID than SCH 80 so if your darts are smaller than typical, you should try that.

Uh, C, it's the other way around man.
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#5 cxwq

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Posted 23 December 2003 - 05:16 PM

True enough.

To correct and clarify my previous post:

1/2" SCH40 (white) is less than or equal to .622" ID (nominally .608")

1/2" SCH80 (gray) is less than or equal to .546" ID (nominally .528")

These vary since the only absolute requirements on PVC are OD (.840" for all kinds) and working pressure which varies from one type to another.
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#6 waspy

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Posted 23 December 2003 - 05:47 PM

I use sch.80 for my megas and it's also good for micros,so you can fire any ammo with it.
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#7 Cankywanky

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Posted 23 December 2003 - 05:48 PM

can anyone here give me plans to build a bolt action rifle. ive had some ideas but they never worked.
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#8 cxwq

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Posted 23 December 2003 - 06:43 PM

Search for BoltSniper's early posts. He's the only one here who has made a nice, well-documented homemade bolt action.
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#9 Cankywanky

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Posted 24 December 2003 - 12:47 AM

how can i attach a copper ball valve to a pvc pipe?
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#10 andrew01

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Posted 24 December 2003 - 07:48 AM

how can i attach a copper ball valve to a pvc pipe?

I used a metal ball valve for my homemade. I just hooked up a coupler to the pvc then screwed it into the ball valve. The coupler does not screw all the way in, but enoough to make a seal. Click on the link to see a picture(or copy and paste it): http://www.freewebs....newhomemade.htm
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