Blue Diamond ET Series Air Pumps are versatile pumps that are suitable for intermittent or continuous operation in aquariums, ponds and certain septic applications. Weatherproof pump has a robust and compact construction, and the main body is constructed of cast aluminum alloy. Easy-to-replace diaphragms return pump to full performance, and are specially formulated for extended life. Connections Plain horizontal 18.0mm (0.71") O.D. outlet connection fits 3/4" I.D. tubing. A 3/4" rubber elbow is also included. Pump also comes with barbed fitting that threads into the interior of outlet to provide a 12.0mm (0.47") O.D. barb for 1/2" I.D. tubing.
