The Hiblow HP-40 Septic Air Pump is the smallest model manufactured by Hiblow USA, and it’s approved for use in aerobic septic systems. Due to its small size and low power consumption, it produces little heat, which allows the HP-40 air to provide you with a long service period of up to 8 years. This septic pump works well with modern septic systems. The Hiblow HP-40 septic air pump has an output of 40 liters per minute, and it is used on 500 GPD aerobic treatment plants. This linear diaphragm septic air pump is one of the long-lasting and highest quality septic air pumps on the market today. You can use the Hiblow HP-40 to aerate your septic tank, pond or water gardens. Weatherproof Noise Level: 32dB Power Consumption: 38W Airflow Volume: 40Lpm Maximum Airflow: 2.8 cfm Flow Rate Max. Pressure: 12.8 Kpa Frequency Rating: 60 Hz Voltage Rating: 120VAC Loading Pressure: 1.9 psi Dimensions: 8.19 inch L x 6.73 inch W x 7.48 inch H NSF Certified