YS 91 ac - Check valves

[WHIP23 at aol.com]

In a message dated 4/10/03 6:23:52 AM Pacific Daylight Time, 
Eric.Henderson at gartner.com writes:

> 
> Putting two check valves in gives you double the chance of a check valve 
> staying closed.... :-)
> 
> Eric.
> 

Man, there is always something out there to screw you up.

Bob
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