Probably true :)
Mike
>
> 1. All pipe is to be made of a long hole, surrounded by metal or plastic
> centered around the hole.
>
> 2. All pipe is to be hollow throughout the entire length - do not use
> holes of different length than the pipe.
>
> 3. The I.D. (inside diameter) of all pipe must not exceed the O.D.
> (outside diameter) - otherwise the hole will be on the outside.
>
> 4. All pipe is to be supplied with nothing in the hole so that water,
> steam or other stuff can be put inside at a later date.
>
> 5. All pipe should be supplied without rust - this can be more readily
> applied at the job site.
> [N.B. Some Vendors are now able to supply pre-rusted pipe. If available in
your
> area, this product is recommended as it will save a lot of time on the job
site.]
>
> 6. All pipe over 500 ft (153m) in length should have the words "long
> pipe" clearly painted on each end, so the Contractor will know it is a
> long pipe.
>
> 7. Pipe over 2 miles (3.2 km) in length must have the words "very long
> pipe" painted in the middle, so the Contractor will not have to walk the
> entire length of the pipe to determine whether or not it is a long pipe
> or a very long pipe.
>
> 8. All pipe over 6" (152 mm) in diameter must have the words "large
> pipe" painted on it, so the Contractor will not mistake it for small
> pipe.
>
> 9. Flanges must be used on all pipe. Flanges must have holes for bolts
> quite separate from the big hole in the middle.
>
> 10. When ordering 90 degrees, 45 degrees or 30 degrees elbow, be sure to
> specify right hand or left hand; otherwise you will end up going the
> wrong way.
>
> 11. Be sure to specify to your vendor whether you want level, uphill or
> downhill pipe. If you use downhill pipe for going uphill, the water will
> flow the wrong way.
>
> 12. All couplings should have either right hand or left hand thread, but
> do not mix the threads - otherwise, as the coupling is being screwed on
> one pipe, it is unscrewed from the other.
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