Product Description: Dual pump, frost-free installation in the floor or pit of the room, suitable for lifting general sewage or wastewater. Collection tank: Material: HDPE High-Density Polyethylene Capacity: Effective capacity 500L, tank comes with inspection port Gravity inlet pipe diameter: φ110×3，φ160×3 Pressure outlet pipe diameter: DN80/DN100 Drain interface pipe diameter: φ65 (can be connected to emergency manual diaphragm pump) Ventilation interface pipe diameter: φ75