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Click on image for the lowdown. 
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#76216 04/11/2007 9:21 AM | Joined: Feb 2001 Posts: 1,096 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 1,096 | This unit appears to mount on the air horn.
Should be a small hole of a metered size that allows the water to be drawn out of it by the lower pressure area in the venturi.
Cool find. | | |
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