845-454-8171 Menu


The AFC coarse bubble disc diffuser design includes top-quality materials and engineering to improve wastewater treatment. Municipal and industrial systems around the world use these diffusers because of their superior efficiency. SSI focuses on reliability and performance during every step of manufacturing to enhance the client’s experience.


SSI’s coarse bubble disc diffusers have the following applications:

  • Equipment: Clients most commonly use AFC cap diffusers in equalization tanks and aerobic digesters. These applications do not prioritize high-rate oxygen transfer efficiency.
  • Piping: Piping systems that use cap diffusers tend to have PVC, CPVC or stainless steel materials. Construction types can include drilled and tapped pipes, welded 3/4-inch FNPT SS or grommets.
  • Flow: The AFC cap diffuser’s non-clog design suits a variety of flow requirements. It can operate in intermittent and continuous conditions.

Please ask an SSI expert for more information about the uses of coarse bubble diffusers.


Clients can also benefit from the following additional features of the AFC coarse bubble diffuser:

head loss efficiency

Low head loss

In operations involving normal airflow ranges (3-6 scfm), the AFC has an operating head loss of around 5-20 inches of water.


Non-clog design

The diffuser diaphragm opens under air pressure and closes when airflow stops. This design prevents particle clogging and backflow.

afc diffuser

Advanced membrane engineering

A replaceable membrane with 10 perforations covers the diffuser base. It has a design centered around maximum bubble formation and dispersion.

These qualities and more make AFC cap diffusers an indispensable choice for a system installation.


Clients consider SSI the best worldwide choice thanks to:

  • Global staff: SSI has team members and stocking locations around the world to serve clients wherever they work. Our staff has experience collaborating with global clients.
  • Experts on demand: The team includes a complete engineering department that can help clients design their wastewater aeration systems. We can provide consulting on a variety of elements, including full redesigns.
  • Forward-thinking design: Every SSI product has reliability, efficiency and quality built into its design. SSI strives to improve products with each new development.
  • Unparalleled support: Clients can always contact the support team if they have any questions about SSI products. They can ask questions at any stage of the buying process.

Buy coarse bubble diffuser equipment from SSI Aeration, Inc. by contacting a representative today. Potential clients may also begin the purchasing process by requesting a quote.

Contact Us

  • This field is for validation purposes and should be left unchanged.

Tube Diffusers

FINE BUBBLE TUBE DIFFUSER – SSI Aeration’s Fine Bubble Tube Diffuser and advanced membrane materials offer outstanding resistance to chemicals and fouling, in addition to the highest oxygen transfer […]

Read more
wastewater aeration system

Retrofit Membranes for Aeration Diffusers

SSI Aeration, Inc. makes industry standard diffuser membrane retrofitting simple. Our patented products have compatibility with most wastewater systems across the globe for customer convenience. SSI makes retrofitting disc […]

Read more
wastewater aeration system

Aeration Bubble Pattern Image Analyzer

  Quite a lot, actually….            If you are having problems with your aeration basin, you want tips on how to deal with an abnormal […]

Read more
wastewater aeration system

How Do Wastewater Treatment Plants Work?

Wastewater treatment is vital for healthy communities and ecosystems. It provides clean, healthful water for industrial and municipal use, cuts down on disease transmission, and helps ensure a green, […]

Read more
How Do Wastewater Treatment Plants Work