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*Phillip Johnson* · 05-26-2003, 02:47 AM

I would guess a one way check valve.. only a guess.. If you can blow air through one end and not the other, that is what it is. Ive never seen one on any of my trucks but, Ive never really looked....

05-26-2003, 02:47 AM	#2
Phillip Johnson Account Suspended Join Date: Apr 2000 Location: Grants Pass, Oregon Posts: 1,579	I would guess a one way check valve.. only a guess.. If you can blow air through one end and not the other, that is what it is. Ive never seen one on any of my trucks but, Ive never really looked....