I only do blowoff tubes into a bottle while fermenting .. I had a thought about suckback when cold crashing. I submerge the tube into a bottle (or whatever) w saniteser or any liquid to prevent oxidation whilst controlling co2 expelsion from the fermentation. Now when cold rashing a negative pressure develops because of liquid shrinkage (assumed 4%) .. then problem being the liquid gets sucked uphill into the fermeter.
Read solution online is to put very little liquid into a bottle, then when sucktion happens there is not enough liquid to fill the tube and suction breaks and liquid goes back in bottle..
Right ..Rethunk method. Place the blowoff tube in a bottle with no liquid inside! co2 will expell whilst fermenting .. the whole system is co2 'sealed'. Now when cold crashing .. vacuume happens and co2 from te bottle will (should) go back upstream..
Now replacing the bottle w a 5litre empty water jug at the end of the blow off-tube. There should be enou co2 to feedback the vacuume of the liquid shrinkage .. right?
Read solution online is to put very little liquid into a bottle, then when sucktion happens there is not enough liquid to fill the tube and suction breaks and liquid goes back in bottle..
Right ..Rethunk method. Place the blowoff tube in a bottle with no liquid inside! co2 will expell whilst fermenting .. the whole system is co2 'sealed'. Now when cold crashing .. vacuume happens and co2 from te bottle will (should) go back upstream..
Now replacing the bottle w a 5litre empty water jug at the end of the blow off-tube. There should be enou co2 to feedback the vacuume of the liquid shrinkage .. right?
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