<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt">A way to hopefully prevent or at least reduce oxidation on the inside of the tank would be to purge the backside of the weld. Since the tank would be filled with water, running a line from the weld gas tank into the fuel tank (somehow) wouldn't take too much gas.<br><br>Jeff '67 Sqbk<br><br><div><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><div class="y_msg_container">#1a) You can go either route. The sump welded to the bottom of the tank <br>would be a clean way to go about it, but it requires a lot of work to make <br>sure you don't have any leaks. Also, welding on our fuel tanks
can cause rust <br>on the inside, and you really can't seal them very well.<br></div> </div> </div> </blockquote></div> </div></body></html>