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 150L, tank comes with inspection port Gravity inlet pipe diameter: φ110×4, φ75×1 Pressure outlet pipe diameter: DN80 Drain interface pipe diameter: 1" internal thread (can be connected to emergency manual diaphragm pump) Ventilation interface pipe diameter: φ75