<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">In a message dated 4/7/03 8:22:49 AM Pacific Daylight Time, James.Woodward2@edwards.af.mil writes:<BR>
<BR>
<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">McMaster Carr sells Teflon and silicon material. I ordered 2' of "surgical<BR>
grade" silicone, and 2' of red silicone tubing. The surgical seems to work<BR>
really well. However, each one will break quickly if you exceed a 1/4" or<BR>
so gap between the header and pipe. The closer you get them, the better for<BR>
coupler life.<BR>
Jim<BR>
</BLOCKQUOTE><BR>
<BR>
McMaster Carr has some silicone tubing that has a braid in it and it has proven pretty indestructible for me. The pbraid keeps it from tearing, like the other stuff. Also the farther you can keep the joint from the head the better (cooler). I agree the gap is also an issue. Teflon works great, but not as flexible, and harder to get a grip on.<BR>
<BR>
Bob</FONT></HTML>