Look up "thumper" elsewhere on the net. I guess it looks like a miniature corny keg in design. You can use a big mason jar, or one of those stainless latching sugar containers. Feed beer through a dip tube into the bottom and it will flood the hops and push up through the hole at the top of the container. Stainless or copper scrubbie can be used for the filter on the out post going to your cfc.
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