Do you have a worn or missing O-ring for your HopRocket? Over time, O-rings will wear down, fray and eventually disintegrate. A missing or faulty O-ring can mean the difference between a successful brew day and wort leaking all over while you curse your bad luck. Replace that O-ring, or have backup on hand just in case! The HopRocket O-ring from Blichmann Engineering is the perfect replacement!