SpudFiles

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.

There should be little writing on the fittings(check the edges). SCH 40 or 80 and NSF-PW should be on it.

They are pressure rated if they say nsf-pw on them. If they say nsf-dwv on them, they aren't pressure rated.

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.

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

note: i wont be taking it up to that high or pressures, it just for messing around with in my back yard

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?

its pvc, and it has markings, but none saying the schedule or its dwv or pw.

ill take pictures if need be.

Take some pictures then.

If your camera does macro, take pictures of the writing too.

sorry about the horrible quality, my camera was dying so i could even get flash [/img]

the reducer is dwv, but im not sure bout the first pic

well i guess ill just scrap it

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

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.

well, it could be used for a hairspray combustion, but even then its kind of risky

where is a good place to get nsf-pw fittings? cause all the ones at home depot seem to be dwv

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