Coarse Bubble Diffusers – Evoqua: Envirex

Evoqua: Envirex Coarse Bubble Diffusers are used in aerobic digesters or sludge holding tanks and offer the advantage of sealing the piping system when the air is turned off. Wideband™ coarse bubble diffusers can be used in a variety of aeration and mixing applications. Diffusers and piping are available in 304L or 316L stainless steel. SnapCap™ coarse bubble diffusers consist of an EPDM diaphragm that seals the piping system when air is turned off and can be used PVC or stainless steel piping. Ideal for tough duty applications such as grit chambers, flow equalization, channel aeration and intermittently used basins.

General Information

  • Air on / air off operation: Yes
  • Applications: Conventional Activated Sludge, MBR, SBR, Oxidation Ditches, Channel Aeration, Aerobic Digesters
  • Fixed to floor systems: Yes
  • Performance warranties: Yes
  • Retrievable (liftable) design available: Yes
  • Shop oxygen transfer test: Available

Discfuser® coarse bubble diffusers are used in aerobic digesters or sludge holding tanks and offer the advantage of sealing the piping system when the air is turned off.


Wideband™ coarse bubble diffusers can be used in a variety of aeration and mixing applications. Diffusers and piping are available in 304L or 316L stainless steel.


SnapCap™ coarse bubble diffusers consist of an EPDM diaphragm that seals the piping system when air is turned off and can be used PVC or stainless steel piping.

Product Assistance

Please describe the products or service needs in the short form below and our technical assistants will work closely with you to ensure you have all necessary parts shipped instantly. You can also call our experts at 800-366-7867.


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