<HTML><HEAD> <META charset=US-ASCII http-equiv=Content-Type content="text/html; cha= rset=US-ASCII"> <META content="MSHTML 6.00.2800.1170" name=GENERATOR></HEAD> <BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #fffff= f"> <DIV> <DIV>In a message dated 3/18/2004 8:00:23 PM Central Standard Time, cmpiano@= comcast.net writes:</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue = 2px solid"><FONT face=Arial size=2>Home Depot has red copper and blue co= pper but don't know the difference.  A plumbing shop down the street, s= aid that it was the thickness of the copper.  There is green, blue and = red.  He said that Green is made for air and is cleaned on the inside (= used in hospitals etc.)  Also expensive.  </FONT></BLOCKQUOTE></DI= V> <DIV>      Copper tubing that has red lettering is = called type "M" copper and is used for a basic residential and light commerc= ial plumbing both liquid and air.  Type "L" has blue lettering.  I= t is used for heavy duty plumbing and air lines and has a higher pressure ra= ting.  Both come in straight hard 10'-20' lengths or in soft rolIs up t= o 100'.  You can "sweat" the fitting on, use compression fittings,= or flare fittings.</DIV> <DIV>      I don't remember for sure but suspe= ct the green is for refrigeration.  It is internally dried and sea= led at the factory.  Comes in 50' rolls and perhaps 100'.  My= .02 worth.</DIV> <DIV>Charles Cron</DIV></BODY></HTML>