Check the listing for details. AFT-N3500E | Fine Bubble Tube Diffuser 20 inch | EPDM Membrane | SSI Aeration. Condition: New. Listed at 79.99 USD. AFT-N3500E | Fine Bubble Tube Diffuser 20 inch | EPDM Membrane | SSI Aeration *Original*Size 20“x 3.8” inch3½4 NPT ConnectionEPDM membraneConnector options: Standard nipple pipe connection or SSI’s Snappy Saddle Mount. SSI Tube Diffusers offer high oxygen transfer efficiency, low pressure loss, and are easily installed. The AFTS tube diffuser system combines engineering excellence, superior component quality, and a technically advanced product design. Proven highly durable and efficient in thousands of municipal and industrial installations around the world, this advanced system has reliability built into every stage of performance FINE BUBBLE TUBE DIFFUSERSSI Aeration’s Tube Diffuser and advanced membrane materials offer outstanding resistance to chemicals and fouling, in addition to the highest oxygen transfer with an acceptable headloss QUALITY MAKES SSI’S TUBE DIFFUSER THE BEST CHOICE FOR RETRIEVABLE GRIDSIndustry standard size and shape, interchangeable with other systemsConnector options: standard nipple pipe connection or SSI’s Snappy Saddle™ Mount which makes one-person installation easyVariety of lengths, diameters and membranes in 21st century materialsExcellent fouling resistance thanks to PTFE-coated surface layers, EPDM™, anti-static EPDMMultiple integral check valves to keep your aeration piping system cleanMolded membranes with individual thermocouples in each cavity provide 100% quality controlLow membrane plasticizer content to reduce shrinkage and hardening, but enough to avoid creep212F (100C) temperature resistance and environmentally friendly high temperature ABS bodyAffordably priced for first use or retrofit. Water Aeration prevents water from freezing, oxygenates water, helps keeps plants and animals in the water alive. Life by Air supplies aeration kits and equipment for all types of water bodies and applications Oxygen transfer for Pond, Lakes, Aquariums, Canals, Commercial Fish Farms, Koi Fish Tanks, Aquaculture, Shrimp Farms, Pool Ponds and more. In aquatic environments like fish ponds, aquariums, lakes or aquaculture projects, oxygen is the single most limiting factor for success | Aeration keeps plants and animals in the water alive | Contact Life by Air for more information.