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dumb question, but i need help

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dumb question, but i need help

Unread postAuthor: Victortheman123 » Sat Oct 06, 2007 6:07 pm

how can you tell if your fittings are pressure rated? i just made a pneumatic co-axial and i am afraid they aren't pressure rated or dwv. i bought them from home depot btw. can some one help me out, ill take pictures if need be.
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Unread postAuthor: windshrike » Sat Oct 06, 2007 6:11 pm

There should be little writing on the fittings(check the edges). SCH 40 or 80 and NSF-PW should be on it.
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Unread postAuthor: potatoflinger » Sat Oct 06, 2007 6:11 pm

They are pressure rated if they say nsf-pw on them. If they say nsf-dwv on them, they aren't pressure rated.
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Unread postAuthor: HaiThar » Sat Oct 06, 2007 6:12 pm

They have a little sign that says NSF- PW. Most of the bends @ HD are PW I think...but you'll want to check your couplings and caps.
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Unread postAuthor: Victortheman123 » Sat Oct 06, 2007 6:15 pm

i checked but i don't see anything, i made a stupid mistake of already gluing them :oops:

note: i wont be taking it up to that high or pressures, it just for messing around with in my back yard
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Unread postAuthor: windshrike » Sat Oct 06, 2007 6:21 pm

DWV can burst at any pressure from 15 psi to 90 psi.
If it has no markings, are you sure that it is even PVC?
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Unread postAuthor: Victortheman123 » Sat Oct 06, 2007 6:27 pm

its pvc, and it has markings, but none saying the schedule or its dwv or pw.
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Unread postAuthor: Modderxtrordanare » Sat Oct 06, 2007 6:34 pm

ill take pictures if need be.


Take some pictures then. :)

If your camera does macro, take pictures of the writing too.
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Unread postAuthor: Victortheman123 » Sat Oct 06, 2007 6:50 pm

Image

Image

sorry about the horrible quality, my camera was dying so i could even get flash [/img]
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Unread postAuthor: sandman » Sat Oct 06, 2007 6:56 pm

the reducer is dwv, but im not sure bout the first pic
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Unread postAuthor: Victortheman123 » Sat Oct 06, 2007 6:59 pm

well i guess ill just scrap it :cry:

a day wasted.... but aah well, atleast i didn't get shards of pvc in my face

by the way, thanks for helping me out, it is appreciated greatly
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Last edited by Victortheman123 on Sat Oct 06, 2007 7:01 pm, edited 1 time in total.

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Unread postAuthor: DYI » Sat Oct 06, 2007 7:01 pm

Oh dear...

As far as I can tell, there isn't a single pressure rated fitting on the entire thing. Also, whatever is holding in that shrader valve doesn't look terribly sturdy.

As long as you don't take it over 10 psi, you should be fine. If you plan on actually using it for anything other than a pipe bomb, you should replace the fittings with NSF-PW ones.
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Unread postAuthor: sandman » Sat Oct 06, 2007 7:01 pm

well, it could be used for a hairspray combustion, but even then its kind of risky
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Unread postAuthor: Victortheman123 » Sat Oct 06, 2007 7:02 pm

where is a good place to get nsf-pw fittings? cause all the ones at home depot seem to be dwv
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Unread postAuthor: windshrike » Sat Oct 06, 2007 7:07 pm

Look around more, my HD has both, maybe you just missed them.
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