Quality 1st's recommended annual service on pumps include a complete disassembly and cleaning in order to keep the system operating at its best as a reliable wet basement solution. The airtight lid is removed to access the cast iron 1/3 hp Zoeller for cleaning and changing check valves as well as checking the float switch. Batteries are replaced on the WaterWatch alarm and the sump pump liner is sanitized before the pump is reassembled. Through annual maintenance, Service Technician John helped the homeowners in Penns Grove enhance the operation and life of their SuperSump .