Blue Diamond Enviro ETA-120 Linear Diaphragm Air Pump With Alarm, 120 LPMThe ETA series range of air pumps ensures that there is plenty of water movement in wastewater applications; this boosts oxygen levels in the water, allowing aerobic bacteria to decompose. When used in medical applications, the ETA series provides a high flow at low pressure. Features & Benefits Robust and compact construction weatherproof Green drive technology offers energy efficient motors meaning low power consumption 30 to 500 litres per minute