Customer called us out for back up in the basement shower. Customer had a sewage ejector pump that was not being turned on by the float. I recommended removing the lid and unsticking the float. Customer agreed. I removed the lid and observed how the float was running and it turned out it was jammed against the side of the basin. I moved the sewage ejector pump slightly and tested the pump and it worked well. I reset the lid and saw that the 90 on the vent pipe was pushing the gasket into the basin so I propped it up. I screwed the lid down and siliconed the entire lid. Tested the pump about 12 times and had no issues.