Now that I've thought about your question for a little while, I have
Why does it matter?
As long as they blow something up, I'm satisfied.
Besides, one definition of a myth is "any invented story, idea, or
If anyone (even a cast member) says "A car can be split in two by a
snowplow", it then becomes something for the Mythbusters to try to
confirm or bust.
On 12/8/2011 1:16 PM, email@example.com wrote:
It's not over-pressure that's the instigating event OSHA reg's are
particularly concerned about and it's not a typical home shop 3/4 or
1/2" line that's going to be enough pieces to be a major issue even if
one were to be broken (altho it would only take one very small piece in
the right direction to take an eye).
They're mainly concerned about distribution lines in large industrial
facilities and the possibility of external damage being the instigating
But, even though it's not a very likely problem there's really little to
recommend using it even in the home shop as there's generally so little
actual material the differential cost just isn't that big an issue so
one might as well do it right.
Of course, if one is running a commercial or school or other shop
subject to OSHA one definitely doesn't want the potential liability of
ignoring the best practice standard not to mention the possible citation
All in all, while it's not a major likelihood, it just isn't smart.
I suppose you have not priced galvanized or copper pipe recently. When
I did my shop with galvanized sch40, the pipe and fittings were well
over $200 and that was several years ago. PVC would have been about
$30 and you can just paste it together. I know you yankees say I
should have used black iron but it rusts up too fast in Florida.
I still agree with the do it right part tho.
It is all of the elbows, reducing bushings and couplers that add up.
fast. Unless you have the tools to thread pipe, you also end up buying
a lot of short nipples. They "two and three dollar" you to death.
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