Question about a gun I'm making

MisterSteve124 · Tue Apr 11, 2006 4:03 pm

I'm making a new cannon today and ill be using 3" pressure rated PVC for the chamber that will be about 3 feet long and a 2" 4 foot long barrel. I can't find a spot on my fittings that says they're pressure rated so I assume they aren't. Is there any chance this will explode if im only using right gaurd and maybe other aerosol sprays as fuel? I'm also using reduced tees for 2 handles but im blocking out the bottom part with a plastic cap and some sheet metal.

boilingleadbath · Tue Apr 11, 2006 5:39 pm

Could you get us some pictures of the fittings? Some fittings are called NSF-61, which while tecnicaly not pressure rated, typicaly correlates.

MisterSteve124 · Tue Apr 11, 2006 8:18 pm

Yeah I don't see that on the fittings. I hope it works because I already made it. Shouldn't it be fine because im just using right gaurd? Any way heres some pics....

Shrimphead · Tue Apr 11, 2006 8:32 pm

On the ends that you stick the pipe in raised letters it will say whether they are pressure rated or not. If it says nsf-pw then they are. And it doesn't matter for a combustion even if you wanted to use propane.

MisterSteve124 · Tue Apr 11, 2006 8:59 pm

ok well its not pressure rated but i guess that won't matter because im not looking to hook up propane or pnuematic so i hope it won't explode. Ill submit it soon once i wire the igniter and maybe paint it. It looks like a rocket launcher its pretty cool.

boilingleadbath · Wed Apr 12, 2006 12:17 am

I don't like the saftey margins of working with DWV fittings/pipe, but whatever...

For future reference, those <i>are</i> DWV. It's rather easy to tell - a quick glance at the socket deapth reveals the truth.

MisterSteve124 · Wed Apr 12, 2006 9:13 am

its all dwv its just that the pipe is pressure rated and the fittings aren't.

boilingleadbath · Wed Apr 12, 2006 11:24 pm

Yes, pressure rated pipe will be marked "DWV".
Why? Because, if you wanted to, you could use pressure rated pipe for drainage.