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Old November 14, 2011, 10:07 AM   #54
Mike Irwin
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Join Date: April 13, 2000
Location: Northern Virginia
Posts: 36,243
"lead the water out to the sprinkler with freeze proof plastic tubing, and switch to either copper or galvanized for the last 10 feet or so."

Uhm... why?

I can't see any reason for going from copper to plastic back to copper. The plastic buys you absolutely nothing and the unions are generally a pain in the ass to work with compared to a straight run of copper.

Or, make one union and go all plastic.

The "copper to galvanized to stainless, to bronze, to plastic, to carbon nanotubes, to PVC to CPVC to ABS to copper" doesn't make a lot of sense.
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