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Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Unread postAuthor: starman » Thu Apr 02, 2009 7:49 pm

McMaster has 8" sched 80, 5' length....apparently no sched 80 10". Probably way out of your budget range though. It is 250 psi though which is quite high for such a large pipe.

I think sched 40 or 80 10" is probably not going to happen for you. The basketball drainage pipe is what you're stuck with.

Check your local commercial pipe distributor, see what they have to offer...more than likely won't have any thing small though.
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Unread postAuthor: rcman50166 » Thu Apr 02, 2009 8:17 pm

haha what are you talking about? $108 is a great deal for that size pipe, seeing as i was looking at the same thing for $100 more. I'm just going to assume they have the necessary bushings and fittings. Not sure why I didn't check there first. I've heard McMaster is overpriced.But thanks! :D Also, before I go ahead with this, does anyone have an objection with using 8 inch pipe for a 3 inch barrel?
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Unread postAuthor: daberno123 » Thu Apr 02, 2009 8:28 pm

10" Schedule 40 PVC Pipe- 12" long on eBay

Not very long, but probably the cheapest you'll find.
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Unread postAuthor: rcman50166 » Thu Apr 02, 2009 8:55 pm

No that's to short. Plus I'm thinking of moving down to 8 inches, it won't be the biggest but it's still big. Anyways so if I get a 8" to 6" reducer bushing, and then use a 6" to 3" reducer bushing, does that mean I need a small section of sch 80 6" pipe?
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Unread postAuthor: jook13 » Thu Apr 02, 2009 8:56 pm

Yes, yes it does.

edit, I mean no, after thinking about it, I dont think that you do.
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Unread postAuthor: c11man » Thu Apr 02, 2009 9:19 pm

is the 6 to 3inch reducer a spigot by slip?

if so then you do not need a small peice

if it is slip by slip then you need a small peice of pipe
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Unread postAuthor: rcman50166 » Thu Apr 02, 2009 9:39 pm

I'm not sure what your talking about, so here's what im looking at. I've always used bell reducers :oops:
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Unread postAuthor: mark.f » Thu Apr 02, 2009 9:43 pm

You don't need pipe if you're just using two bushings.

You can also file off the rim of the smaller bushing and shave some length off of the back, to make it fit flush into the first bushing. That way, it only looks like you're using one bushing.
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Unread postAuthor: rcman50166 » Thu Apr 02, 2009 9:49 pm

Ok, cool. Thanks :D Hmm... is there a reducer that goes from sch 80 6" to sch40 3" ? Or am I just being picky? Cause I would like to use a sch 40 barrel so I don't need to order one.
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Unread postAuthor: thisnobody » Thu Apr 02, 2009 10:07 pm

usplastic.com
cheap it aint!!
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Unread postAuthor: c11man » Fri Apr 03, 2009 7:40 am

well sch 40 and sch 80 can be used to gether so you will have no problem

another cheep place for sch 40 fittings is www.flexpvc.com

slightly confusing homepage but very cheap fittings

the best part is that EVERY fitting on the site (unless noted) is pressure rated. even the 2inch to 5 3/4inch manifold!!! a 3inch tee only costs like $11

if you cant find the part you are lookinf for there just email, call, or place the "cant find what i am looking for" item in the cart and enter you question if the provided box in the check out
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