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DWV

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

Unread postAuthor: elitesniper » Wed Nov 21, 2007 7:03 pm

hey guys i just got a pip thats says nsf-pw but next to it it says dwv then its says 330psi 70F. this pipe should be safe right?
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Unread postAuthor: DYI » Wed Nov 21, 2007 7:09 pm

Well... It has a pressure rating doesn't it?
DWV is simply a National Sanitation Foundation rating meaning Drain, Waste, Vent. Absolutely nothing to do with pressure.
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Unread postAuthor: elitesniper » Wed Nov 21, 2007 7:16 pm

it says nsf -pw and nsf -dwv BUT its rated to 330psi at 73F so ill be ok?
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Unread postAuthor: windshrike » Wed Nov 21, 2007 7:17 pm

YES.
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Unread postAuthor: Zen/// » Wed Nov 21, 2007 7:19 pm

YES.

:evil:
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Unread postAuthor: windshrike » Wed Nov 21, 2007 7:22 pm

YES.

_ :twisted:
:twisted: :twisted:
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Last edited by windshrike on Wed Nov 21, 2007 7:23 pm, edited 1 time in total.
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Unread postAuthor: Zen/// » Wed Nov 21, 2007 7:23 pm

NO
:evil: :evil: :evil:
SARCASM 8)
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Unread postAuthor: windshrike » Wed Nov 21, 2007 7:25 pm

OMG NO WAY!!!!!

Back on topic: Yes, elitesniper you will be fine using that pipe, just make sure that it isn't yellowed or cracked and that you solvent weld it properly.
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Unread postAuthor: DYI » Wed Nov 21, 2007 7:26 pm

Your failure to grasp the concept is frustrating. It would be misleading and illegal for the manufacturer to print "330 psi" on the side of a pipe that wasn't rated for that pressure.

In case you need a translation, the rating "330 psi @ 73F" means that the piece of pipe it is printed on is rated, with a safety factor appropriate to the material and intended use, to a pressure of 330 psig (22.45 bar), at 73 degrees fahrenheit. NSF PW means that the National Sanitation Foundation has approved of the use of this piece of pipe for Potable Water delivery systems. NSF DWV means that the National Sanitation Foundation has approved of its use for Drain, Waste, and Vent systems.
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Unread postAuthor: BigGrib » Wed Nov 21, 2007 8:26 pm

good job DYI thanks for the info <--not sarcasm cause i didn't know what they meant, now what is it that everyone says about dwv fittings they dont like because they are a shallower socket right??
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Yea, that's definitely going to get you at least a tazer.

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Unread postAuthor: DYI » Wed Nov 21, 2007 8:56 pm

Most PVC fittings that are ONLY rated DWV, and not PW, are not pressure rated for any more than 10 psi or so. These fittings often have a shallower socket depth than pressure rated fittings, because they are not designed to withstand any more pressure than a common drainage system encounters. This is only true of plastic though. DWV copper is commonly rated for over 400 psi, even though it has no PW rating.
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