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DWV Reducers

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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DWV Reducers

Unread postAuthor: iPaintball » Mon Apr 09, 2007 10:18 pm

Is it okay to use dwv reducers for my cannon? I can't find any 3" bushings so I have to take my 3" chamber down to a 2" port to glue in a bushing. I've seen a couple other people do it (Scott's Cannon) and I can't order anything of of mcmaster. Thanks for any help!
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Unread postAuthor: hi » Mon Apr 09, 2007 10:23 pm

if its combustion its ok. pneumatic, probably not to smart.
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Unread postAuthor: Velocity » Mon Apr 09, 2007 10:28 pm

I do not take any shortcuts, even on my combustion (which is currently in the works). Anything 0-80 PSI is SCH 40; 80 PSI any beyond is SCH 80 or some type of metal. Some people are much more willing to take risks; I have seen DWV pneumatics being taken to 120 PSI, and SCH 40 being taken to over 200 PSI.

If you are a great solvent welder, then DWV would probably be OK for a low pressure pneumatic. If you want to feel safe all the time however, spend the extra dollars and get the pressure rated parts.
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Unread postAuthor: iPaintball » Mon Apr 09, 2007 10:31 pm

It's a pneumatic, and I am a really good solvent welder. The reducer is SCH 40, BTW...
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Unread postAuthor: integral » Mon Apr 09, 2007 10:45 pm

dude... just spend some extra bucks and buy some nsfpw fittings. if ur trying to save some bucks.. just ask urself: is my eye worth 4 bucks?
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Unread postAuthor: iPaintball » Mon Apr 09, 2007 10:50 pm

Where can I buy pressure rated reducers?!! (I can't order them)
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Unread postAuthor: hi » Mon Apr 09, 2007 10:53 pm

there has to be some place near you that has them. like integral said, is not worth it. you could use iron parts. they are only $7-10 or so and will hold way more than any pvc will ever hold.
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Unread postAuthor: pyromaniac » Mon Apr 09, 2007 11:01 pm

just wondering if you were as stupid as me and found the right reducer but thought it didn't work because it was the same size as your chamber.

If so buy a coupling and put it in there.
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Unread postAuthor: integral » Mon Apr 09, 2007 11:09 pm

if u cant find a reducer... just buy the other fittings such as bushings and couplings to make the nessecary fitting. if u weld it correctly... it would be just as strong.
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Unread postAuthor: Pete Zaria » Mon Apr 09, 2007 11:44 pm

Actually, coupler and bushing is the most accepted way to change pipe size in pressure applications.

A coupler and bushing, both NSF-PW sch40, are what you're looking for. Open your phone book and call plumbing supply stores and sprinkler shops.

Peace,
Pete Zaria.
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Unread postAuthor: iPaintball » Tue Apr 10, 2007 6:28 am

Thanks guys!
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