Originally Posted by bufitfn
After doughing in, I tried to pump through the herms coil and in about 20 seconds, nothing. I only ran pump half open and when I stirred the mash it was rock hard! I loosened it and tried again to no avail. When cleaning the mash tun I noticed every slit in the bottom was clogged with grain not letting any liquid through! I had to scrub it with a brush to clean. What's up? I can't find anyone else that experienced this problem. Please help
PS... Pumpkin ale, no wheat, 21 lbs grain with 1.5 qt per lb.
I disolved the pumpkin in the strike water before doughing in so thats not it.
I had the same problem this last Saturday brewing a Kolsch with 11 lbs of grain at 1.5 qt per lb. About 3 or 4 minutes into the recirculation to raise temp from 122 F to 149 F it slowed down to trickle at 143 F! I wasn't sure where it was plugged (I checked all the lines and pump and they check OK). I thought maybe some of the grain got under the false bottom and plugged up the pick up tube. After reading your post I now believe I had the same problem you had with the grain getting stuck in the false bottom slots.
This was not the first time this happened but in previous times it just slowed down a bit but never to a trickle.
I was never able to recover on this one and had to dump it out...don't worry it wasn't beer yet!
Where did you get your ss screen?
Now that I think about it, I missed my original temp of 122 (it was 128) I stirred it quite a bit to get the temp down. I use a maple stir spoon that I may have run across the false bottom quite a few times. This may have created the problem by smashing the grain into the slots plugging them up.