Bob et al.
Using large diameter (2 inch) galvanized for the main line is OK (good for
storage and less friction loss and relatively cheap compared to 2 inch
copper) and I can see why you would want to use sweated copper for the drops
(less leaks). My suggestion would be to isolate the copper drops from the
steel to eliminate internal corrosion of the steel. Dissimilar metals are
known for their accelerated corrosion thus isolation is necessary unless you
want to have drop lines clogged with rust in a few years. Copper has an
excess of free electrons and will always be sending those trons to visit the
steel connections. Corrosion never sleeps!
Durwood
51 Chevy 1/2 ton Deluxe 5 window
>Might want to check out these links for some ideas. I have seen quite a
>few
>discussions on various boards re which pipe material and I think the
>consensus is a combination of galvanized and copper. If the piping is
>complex and large it will be very difficult to get all the very small air
>leaks out of it. If you use large galvanized pipe for some of the main
>lines and use soldered/sweated copper on the rest you will minimize leaks.
>>http://www.autobodystore.com/cgi-bin/config.pl?read=51082
>http://www.vettenet.org/garage.html
>http://www.sharpe1.com/dr-pipe.htm
>
>
>Bob Welch
>Bartlesville, OK
>
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