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<DIV><SPAN class=639522317-30062004><FONT face=Arial color=#0000ff size=2>Hi
Nat,</FONT></SPAN></DIV>
<DIV><SPAN class=639522317-30062004><FONT face=Arial color=#0000ff size=2>I used
the YS check valve with both my O.S. 140 RX and Mintor, and never had a
dribble issue. At the table I tend to dribble, but that's another issue! One
thing that works well for many is to run the tank vent to a place well behind
the tank. If the end of the vent line is both behind and below the tank
when upright, then there will be no siphoning problem in flight, or on the
ground. </FONT></SPAN></DIV>
<DIV><SPAN class=639522317-30062004><FONT face=Arial color=#0000ff
size=2>Regards,</FONT></SPAN></DIV>
<DIV><SPAN class=639522317-30062004> <FONT face=Arial
color=#0000ff size=2>Dean</FONT> </SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org
[mailto:discussion-request@nsrca.org]<B>On Behalf Of </B>Nat
Penton<BR><B>Sent:</B> Wednesday, June 30, 2004 1:08 PM<BR><B>To:</B>
discussion@nsrca.org<BR><B>Subject:</B> YS checkvalve<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>The YS checkvalve will readily open with almost
zero differential pressure. Going the other way it takes <U>about</U> two psi
to get a seal. At a lower pressure there will be some dribble. Is there a
better solution for the tank vent line? Nat
Penton</FONT></DIV></BLOCKQUOTE></BODY></HTML>