[EDIT: Now solved. See this post below. A good example though of how hard some answers are to find.]
Just when I thought I had seen everything!
Okay, here's a pic of my (and youmustbemellow's) last brew... It's a simple pail with two holes in the lid. The centre one was originally blanked off before I posted this but, in this pic, has a Steri-lock now attached. The hole that is off-centre has a five-holed bung that I can do all sorts of stuff with. A five-holed bung comes in two parts. Here's some pics showing the two parts and when it is assembled... One of many advantages of such a bung is that it also acts as an air-lock. As pressure in the fermenter increases, obviously, the "flap" between the two parts separates and allows CO2 to escape.
I've used these five-holed bungs on countless brews, love them, so figure this one out...
Pitched on Monday night. On Wednesday morning, I happened to notice that the fermenter lid was bulging upwards (should have taken a pic) at least an inch (2.5cms but I think about 3.5) above the top of the fermenter.
I've used silicone bungs in some wild transferring experiments to know that your lid will usually blow out way before they do but, what was happening here? This is simple, basic physics, the pressure should easily escape?
Anyway, I peeled the flap out to let the pressure off but had to repeat that several more times on Wednesday. I would have swapped the bung over but didn't have another one up my sleeve at that time.
This morning (Thursday), I released the pressure again and sprayed some no-rinse sanitiser between the two parts thinking that maybe I or youmustbemellow might have assembled it dry or something??? (That shouldn't matter anyway).
Came back three hours later and lid swelling again . It gets worse though...
A few hours ago, I finally had a replacement bung available so I swapped out the bungs. Just before writing this, lid was swelling again, bung wasn't opening. What the...???
Have now put a normal air-lock into the centre bung.
This is honestly the weirdest thing I have ever seen in brewing. The only thing I just thought of was that maybe I had the silicone bungs in some chemical that made them sticky but I know that is not correct.
So, figure that one out!
Post #1 made 2 years ago
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Last edited by PistolPatch on 19 Jun 2017, 00:06, edited 3 times in total.
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