I received my Fermzilla and the corresponding pressure kit last week. I brewed on Saturday, and similar to brew703, I am having issues getting the fermenter to seal.
I noticed after fermentation had started taking place that I wasn't getting a reading on my spunding valve's gauge. I put my ear down to the fermenter and heard an audible leak somewhere on or around the lid. I was able to pinpoint the leak by spraying soapy water on it, and sure enough, it is a bad seal around the lid. In an attempt to fix it, I unscrewed the threaded lid ring, rotated the lid slightly and hand-tightened the ring back down. Once the vessel began to pressure back up I was still able to hear the leak. I decided it might be a bad O-ring so I swapped it out with one of the replacements that were provided. No luck. In a last ditch effort, I replaced the thin, hard O-ring with a thicker soft O-ring. Bingo, I was able to get a seal (or I thought). I am now able to get the pressure up to about 10 PSI before I get a leak around the O-ring. I assume at this point that the leak is happening because the O-ring I have on it is soft and simply can't hold back that much pressure. Sadly, now that I'm holding the pressure at 10 PSI, I'm getting a slow leak from the collection container which is sufficiently tightened down.
I reached out to morebeer (the supplier I bought from) and they sent me the instruction manual that shows "how to secure the lid" and told me I should try plumbers tape. I generally feel like spending $160 on something should mean it simply "just works" and shouldn't require nylon tape every time I replace the collection jar.
Similar to what brew703 said, I generally like the idea of the fermenter, but I'm not sold on it at this time. I'm wondering if the molding on the one I received might be out of tolerance, but can't confirm yet. I may try to get a replacement and see if I have better luck with it. If I do, I will shoot an update.
