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<DIV>I have been using YS check valves in vent lines and never had problems (2C engines). Probably 2000 to 3000 flights in 3 pattern planes. Go figure.</DIV>
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<DIV>VB</DIV>
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<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: "Nat Penton" <natpenton@centurytel.net> <BR>
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<DIV><FONT face=Arial size=2>I found the YS check valve unsatisfactory for low differential pressure applications like vent lines. If it doesent leak with the YS it probably wont leak without a check valve. Nat</FONT></DIV></BLOCKQUOTE></body></html>