SCH. 40 vs ABS

[Technician1002]

http://www.google.com/imgres?q=pvc+air+ ... s:10,i:121

Google it.

[jimmy101]

That NerfHaven thread is an interesting read even though it re-hashes what has been discussed here for years.

I wonder though, for all the folks against using pressure rated PVC (at no more than half the pipe's pressure rating) and insist instead on metal containers ...

then suggest getting a used container from an unreliable source (like Goodwill), or using a container designed for a completely different purpose (like a fire extinguisher) ...

do they pressure test their metal containers?

Seems to me that used compressor tanks in particular are not a good idea. A couple decades with water sitting at the bottom of the tank can't be good for their structural integrity.

Tanks rated for compressed air really have TWO levels of safety: the original design and PERIODIC PRESSURE TESTING. Without the testing the design is unreliable.

[Technician1002]

Glad you brought that up.. It is due again.

and PERIODIC PRESSURE TESTING.

Yes, the black one IS a DWV cell core cannon.