This standard specifies the type, model and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, storage and transportation, quality assurance and services of small sewage and sewage submersible electric pumps. This standard is applicable to single-phase or three-phase small sewage and sewage submersible electric pumps (hereinafter referred to as electric pumps) for transporting various types of sewage or mixed liquids containing insoluble solids such as sediment, fiber, feces, river mud and fertilizer. The power is no more than 22kW.