It doesn't really matter. The old oil based has worked forever, Teflon paste is a little cleaner. Either one will do the job. I use Teflon tape for most everything anymore. Clean and easy to use. Cheap also.
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The best plumbing contractors in Clearwater, FL would be Midway services and and Scotto's Plumbing. They have several good listings.
probably a weld.
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Static test is to make sure the pipe / plumbing is water tight, its so the plumbing inspector can see that its water tight, inside plumbing needs a ten foot head. the best is to ask your plumbing inspector when in doubt as to what he needs to see.
As I was best able to determine, it stands for "Material of Construction" in Plumbing/engineering speak.
I strongly believe PEX pipes and brass fittings are the best.
Water Jetting works best
Paste
Paste
There is none you have to go to PEI or Montreal
Plastic pipe is both affordable and durable, so using it for new plumbing is a good idea.