At 02:47 PM 1/20/2006 -0500, you wrote: >Hope you don't mind me asking you this directly, but I should have >stated that my tanks are steel and my existing fuel lines are >copper. Should I be using brass to connect to my steel tanks? From >the MIL-STD-889 galvanic table, I see that Brass is more reactive to >steel than copper would be. > Dale's concerns about this are well founded but in this case probably not necessary. The issue of corrosion reaction is a valid one, but where there is no water, fresh or salt involved there is also very little opportunity for corrosion. Typical practice is to use steel tanks, brass fittings and copper tubing as he now has. In case it is not obvious yet. So called typical practice is not always proper practice. But, in this case unless there is some special condition where water can collect and immerse the various parts of the tank, tubing and pipe fittings, it is very unlikely that there will be a corrosion risk. If the boat were to be operated while submerged, I would argue otherwise. Since this practical consideration does not warrant the extra expense and effort involved in using more appropriate materials, since there is no corrosion risk, the problem is in effect, unimportant. If the materials were subject to constant dripping of salt or fresh water the conclusion would be different. Regards, Mike Capt. Mike Maurice Tualatin(Portland), Oregon