I’ve fitted a pressure gauge and relief/bleed valve to my King Keg pressure barrels so I can monitor the pressure for leaks but also bleed off any excess pressure if I’ve been a bit generous with the priming sugar. My current brew is conditioning and I noticed the pressure going down after the initial “carbonation” rise. The leak was traced to the rubber band pressure relief valve on the S30 assembly. I’ve managed to fix it but thought “do I really need this?” Previous experience tells me the pressure increases no more the 5 p.s.i. a day during carbonating so providing I perform a daily check I could do without. I know it sounds mad but I hate leaks!