My sump pump water level is above pump . I am not sure if my pump is sermersable or not . It's a pit viper pump 115v . Now when it rains I go down to see if its even working I live in a semi and neighbour says hers is going off all time? With mine I here a quiet humming sound? And my house is also plumbed to sewer drain? Why would people do this if its against code? Am I looking at a lot of money spending to fix problem??