Also having a heck of a time keeping the Berkeley cleanout cover o-ring in place, doesn't matter how much I tighten the cover, that pesky o-ring gets pushed right out of the cover, any suggestions? Take the cover off and use a big file to flatten the oring surface of the pump housing. If that doesn't work Glue the oring in the groove with 3M 8001 adheisieve, availible at most auto part stores