YS checkvalve

[Dean Pappas]

Hi Nat,
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. 
Regards,
    Dean 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Nat Penton
Sent: Wednesday, June 30, 2004 1:08 PM
To: discussion at nsrca.org
Subject: YS checkvalve


The YS checkvalve will readily open with almost zero differential pressure. Going the other way it takes about 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

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