You had better look again. I don't believe you know what you are talking about?
If the Y-S check valve assembly is not the high speed good valve, the world must be turning the wrong way?
The check valve that comes with a Cline system is referred to as a "Duck Bill" valve. It is a rubber tube that is flat on one end. the check valve assembly slides inside the air pressure tube. This rubber tube of the check valve is typically stuck together on the flat end and has to be unstuck before it will pass air ONE way..
Jim
