Rick,

I suppose its a siphon feed.   The cabinet is where I pour all the media into the bottom, under the grate.  There is a tube that runs from the bottom of the hopper to the top of the grate, where a hose takes it to the gun. the gun has another connection running to the compressor.

I picked the cabinet up from Harbor Tools and seems to be pretty well made, especially with the cost.  The assembly and operation instructions were not good at all, however.

Do you know if I have to have the suction running all the time from the shop-vac hooked to the dust port?

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