Do they stock the pumps or are just a dropshipper? Are they a state licensed septic professional like me that sells and works on this type of equipment every day that can help if you have problems? Your guess is as good as mine. Do they carry multiple quantities or just show they do? Stephens Environmental is a brick and mortar business. I stock concrete septic tanks from 330 gallon all the way to 5000 gallons. I stock plastic infiltrator tanks from 500 gallon to 1500 gallon. Thanks for looking and have a blessed day! Enviro linear air blowers/aerators are designed for use in residential aerobic treatment units/ATU’s. Other applications include pond aeration, hydroponic grow systems, compost brewers and packaging machines. 30 to 250 l/min flow. Specially formulated diaphragm material for extended life Flow rate up to 8 l/hr. Due to no wearing parts no reduction in performance. Robust and company construction weatherproof. Easy to service with competitively priced spares kit. Suited to intermittent and continuous duty applications. Whisper quiet operation as low as 35dB. Green drive technology energy efficient motors low power consumption. Specially formulated diaphragm material for extended life. Robust and compact construction weatherproof. Suited to intermittent or continuous duty applications. Used by original equipment manufacturers of NSF certified residential. UL, TUV and CE approved. The item “BLUE DIAMOND ET30 SEPTIC AIR AERATOR PUMP COMPRESSOR TREATMENT PLANT ATU POND” is in sale since Sunday, July 13, 2014. This item is in the category “Home & Garden\Home Improvement\Plumbing & Fixtures\Pumps”. The seller is “stephens-race-engines” and is located in Camp Hill, Alabama. This item can be shipped to North, South, or Latin America, to all countries in Europe, to all countries in continental Asia, to Australia, ZA, to New Zealand.