I learned a valuable life lesson yesterday - If you’re dealing with pressurised vessels or containers, make sure there is something in place to stop it rapidly depressurising.
Yesterday, I noticed that my pressure ferment of my Stone and Wood clone (link here) was not building in pressure, even though my spunding valve was set to a higher psi. I listened closely to the fermenter lid and heard a small hissing sound. Upon investigating, I narrowed down the leak to either the lid itself or the carbonation cap. I replaced the carbonation cap with another after venting the pressure, however, after re-applying some C02, the leak was still there. Here is where my mistake took place. I took off the safety cap that keeps the lid in place on the fermenter and attempted to see if there were any cracks or places the C02 could escape. As the pressure was low, I couldn’t hear any hissing. I added about 10psi of C02 to the fermenter and loosely held my hand on the lid to keep it in place. While bent over, looking directly at the lid, the lid blew off the fermenter and hit me in the eye before sending itself half way across the garage. Key lesson here - never mess with pressurised containers without the proper safety measures in place. If the lid hit about an inch lower, I could have lost my right eye. Instead, I’ve got a swollen eye socket, 2 cuts above and below my eye, and an embarrassing story.
Luckily, I fixed the leak. Never again though am I going to apply pressure and stare directly into the main exit port of a fermenter.