I’m doing recirculating eBIAB in a steamer basket with a Wilser bag. During my first attempt at recirculating eBIAB I found that mash temperatures weren’t even and were about 3 degrees less than the output wort temp. I think the wort was bypassing the mash and going around the edges of the bag and basket.
To help mix the mash and get more even temps I build a recirculating arm with the holes pointing up that sits on the bottom of the bag/basket. It’s similar to the COFI idea but I’m doing small 3-5 gallon batches in a 16 gallon pot so having the holes radially didn’t give me much height to work with. Instead I pointed them vertical to try and float the mash bed. Holes are basically even around it but most of the flow comes out the center which makes it kinda COFIish.
I tested last weekend with a 3.5 gallon grodziski so it was only 4.5 lbs of wheat and 0.5 lbs of rice hulls but it worked great. I didn’t continually measure mash temp but I checked 5 minutes after a step and it was within a half degree across the entire mash. Below is a video of the mash during re-circulation.
To help mix the mash and get more even temps I build a recirculating arm with the holes pointing up that sits on the bottom of the bag/basket. It’s similar to the COFI idea but I’m doing small 3-5 gallon batches in a 16 gallon pot so having the holes radially didn’t give me much height to work with. Instead I pointed them vertical to try and float the mash bed. Holes are basically even around it but most of the flow comes out the center which makes it kinda COFIish.
I tested last weekend with a 3.5 gallon grodziski so it was only 4.5 lbs of wheat and 0.5 lbs of rice hulls but it worked great. I didn’t continually measure mash temp but I checked 5 minutes after a step and it was within a half degree across the entire mash. Below is a video of the mash during re-circulation.
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