The KWY193 reducer's small diameter of 2-1/2 inch duplicates the 2-1/2-inch opening on your dust collection hose. Insert the Shop-Vac brand hose to the vacuum and the other end to one of these fittings to power the dust collection system. The larger diameter of the reducer matches our standard 4 inch dust collection hose to function as regular reducers. These fittings provide a step down from a larger main line to smaller branch lines. This step-down increases air velocity near the machine where it's needed most. This reducer connects to a standard 4 inch dust collection hose and should be secured with a hose clamp. Replaces Big Horn 11447.
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