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pressure rated DWV pipe?

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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pressure rated DWV pipe?

Unread postAuthor: glass_05 » Mon Jul 06, 2009 2:10 pm

i stumbled across some 4inch piping that says "dwv" and also "at 220 psi"

just curious if this was okay to use or not. i was just confused by the two different labels on it. sch 40 if that matters
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Unread postAuthor: PVC Arsenal 17 » Mon Jul 06, 2009 2:31 pm

As long as "NSF-pw" and a pressure rating are printed onto the side of the pipe, it should be acceptable for use with spudguns. I'm pretty sure pressure rated pipe may still say DWV on it even though it is pressure rated.
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Unread postAuthor: mark.f » Mon Jul 06, 2009 2:36 pm

If it has a pressure rating stamped on it, it is pressure rated. Always.
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Re: pressure rated DWV pipe?

Unread postAuthor: Ragnarok » Mon Jul 06, 2009 2:51 pm

This results from mass use of the term DWV for meaning "Unrated", something I don't condone.

What DWV actually means is "Suitable for Drainage, Waste and Venting" - none of which are pressure applications.
As such, almost all PVC pipe could count as DWV - you'd be hard pressed to find a pipe that couldn't cope with the demands involved. Pressure pipe is certainly capable of coping.

As such, DWV is not a good thing to use as an indicator. Use the presence or absence of a pressure rating as your guidance, not anything to do with DWV markings or SCH dimensions.
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Unread postAuthor: glass_05 » Mon Jul 06, 2009 3:03 pm

okay thanks! good to know i will be able to use the pieces!
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