I have had two chili cubes and both developed leaks at connector. First one started leaking badly after a few years. Replaced o-rings but still leaked. Had to buy a new cube and pad. New one started leaking within a few months. ChiliPad said they would look at but since the could not fix the first one I figured they can’t fix the second one. The first system still worked fine except for leak. Decided to directly connect hose tube to pump. Inside connector, I remove internal barb which fits into hose tubes. Cut off end at first o-ring ( to create a pipe) and reinserted it into tubes on hose and silicone elbow at pump. Secured with zip ties as originally used in cube. Fixed the problem. To disconnect hose I have to pull barb out of hose.