Designed for biological aeration in domestic wastewater treatment units and ATUs, the Enviro from Blue Diamond Pumps provides an aeration source in packaged sewage treatment plants. The pumping principle uses an electromagnetically operated diaphragm, eliminating sliding parts, keeping wear and tear minimal. It incorporates energy-efficient motors for low power consumption. It has a weatherproof compact alloy casing that doesn’t degrade over time. It is available with a built-in alarm system that can detect low pressure in the air line,, alerting users via a loud buzzer and LED warning light. 770/831-1122; www.bluediamondpumps.com.