Specifications of the Blue Diamond ET Series Air Pumps. 30 to 250 l/min flow. Green drive technology energy efficient motors low power consumption. Specially formulated diaphragm material for extended life Flow rate up to 8 liter/hr. Due to no wearing parts no reduction in performance. Robust and compact construction weatherproof. Easy to service with competitively priced rebuild kits Link. Suited to intermittent and continuous duty applications. Whisper quiet operation as low as 35dB. Simple maintenance – replacement diaphragms readily available on this site. Grounded 18 gauge 5′ 3 long power cord. Main body made of cast aluminum alloy. The Blue Diamond ET Series Air Pumps can be used for Aquariums, Ponds and certain Septic applications. The ET30 is a 25 watt pump that produces 30 liters per minute or 1.06 CFM at. Connection – plain horizontal 14.0 mm. Also supplied with thread-on barb 10.0 mm. The ET40 is a 30 watt pump that produces 40 liters per minute or 1.41 CFM at. 15 bar Connection – plain horizontal 14.0 mm. The ET60 is a 55 watt pump that produces 60 liters per minute or 2.12 CFM at. 15 bar Connection – plain horizontal 18.0 mm. Also supplied with thread-on barb 12.0 mm. The ET80 is a 85 watt pump that produces 80 liters per minute or 2.83 CFM at. The ET100 is a 105 watt pump that produces 100 liters per minute or 3.53 CFM at. 10 bar Connection – plain horizontal 18.0 mm. The ET150 is a 160 watt pump that produces 150 liters per minute or 5.30 CFM at. 20 bar Connection – plain horizontal 18.0 mm. The ET200 is a 230 watt pump that produces 200 liters per minute or 7.06 CFM at. The ET series is guaranteed for 18 months. Blue Diamond pumps are made in China. NOTE: We also sell a Blue Diamond ETA Series Air Pumps with BUILT – IN ALARMS. Some customers ask about using our Alita, Hakko and Blue Diamond pumps for Septic systems. This is not our area of. Expertise but the following comparison chart is meant to be a help to those customers. LPM = Liters Per Minute. Air Pump Cross Over – Comparrison Pumps. Connection – there is a plain horizontal 18.0 mm. Outlet connection onto which 3/4 I. Tubing can be attached. The pump also comes with a thread-on barbed fitting that threads into the threaded interior of the outlet providing a 12.0 mm. Barb which works with 1/2 I. Tubing and provided clamp. Rubber elbow is also included. The most common problem with this and other large air pumps is premature tearing of the diaphragms because of excessive back pressure. People don’t tend to understand how much air the large sized pumps produce. If an air pump is powering too small of a diffuser or too few outlets, excessive pressure can occur. The solution is to add a tee with a ball valve so that excessive air can be bled off into the atmosphere. Start with the ball valve open and slowly close it until you have the maximum output from your air diffusers without unnecessary back pressure. The item “BLUE DIAMOND ET30 SEPTIC AIR AERATOR PUMP COMPRESSOR TREATMENT PLANT ATU POND” is in sale since Thursday, August 31, 2017. This item is in the category “Home & Garden\Home Improvement\Plumbing & Fixtures\Pumps”. The seller is “luckys-outlet” and is located in Sears, Michigan. This item can be shipped to United States.