[COHO] Big brew progress

[GaryWirt]

All 10 fermentors are happily bubbling away as of 7:00pm this evening.  I'm
excited to see that Jerry's is now doing its thing also. 
 
Meanwhile, I have been somewhat mystified as to why Bill Herrick's brew
would blow out the top of the carboy and none of the others have done so.
After watching the action today and contemplating the situation. I have
found the problem...it is me.
 
Bill asked me during our big brew session if I had a carboy that he could
use.  I said "sure..I have one right here..fill it up".  I was busy throwing
out food, etc.,and we did not discuss the carboy.  This particular carboy I
obtained (for free) in Hong Kong in 1974 on one of my frequent trips there.
It may be somewhat of an antique by today's standards.  It holds exactly 5
US gallons and is used for drinking water in Hong Kong.  One can (and
should) use bottled water in Hong Kong and this "carboy" is the method used.
The lettering on the side of the carboy is Chinese...Mandarin and
Cantonese..I'm not that fluent. 
 
If you look at the attached photos it is obvious that the size of my Hong
Kong carboy...which Bill used ...is smaller than the others.  I think most
others are 6 gallons...or perhaps more.  The top blew from Bill's Brew
because of the small capacity of my HK carboy.  There was little room for
expansion during fermentation...not Bill's fault...mine.  Sorry Bill.  
 
One of the Marlow carboys appears to be a 5 gallon container also (see
photos attached) ...however it is vented via a blow off tube, is happy, and
did not blow up.
 
Lesson learned:  My 5 gallon Hong Kong carboy probably would have been fine
with a blow off tube...had I realized that a small airlock doesn't work in
all situations.
 
Gary
 
 
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