Sewage Pump Selection: 1. When the equipment has a single pump configuration, there is no backup pump, suitable only for sewage discharge within a single toilet room. The sewage volume is small, and pump failure is easy to handle. 2. If the equipment is equipped with dual pumps, a backup pump is available, allowing the two pumps to alternate or act as backups. Suitable for unit basements with moderate water volume. In case of a single pump failure, the other pump can adequately handle sewage discharge until the faulty pump is repaired. 3. Besides the built-in type, the equipment can also be made external, which means the vertical pipe sewage pump is mounted outside the collection tank. The advantage is that maintenance is more convenient, but the drawback is that the noise is louder. 4. The pump control cabinet system can be selected in an indoor model or a stainless steel outdoor type.