hello, i just installed my new sump trigger sapphire 26. All the plumbing are good and does not leak except for the part where the overflow pipe meets the bulkhead of the trigger sump. It leaks water from the top rim of the bulkhead where you insert the 1” overflow pipe. Do i have to glue it like the rest of the plumbing or just insert the 1” pipe to the bulkhead? Please help. Thanks!!