<p>Linear diaphragm air pumps from Blue Diamond Pumps Inc are designed for use in sewage aeration applications. Aeration is crucial in the treatment of wastewater - a supply of oxygen is essential in allowing aerobic bacteria to decompose matter, leaving the water clean. The linear range is also ideal for medical applications where a high flow at low pressure is required, such as the inflation of airbeds and CPR mattresses. Any issues with the item you received, please contact manufacturer immediately to resolve.</p><p><b>Click "Add to Cart" now to experience all the benefits of the Blue Diamond Pumps ETD 200!</b></p>