Vertex®, XL4™ Self Sinking AirStation™ has a Vacuum-formed HDPE base, spot-welded for unit integrity. Hollow chamber design for the addition of gravel ballast. 

The XL4 AirStation™ includes four CoActive, self-cleaning disc diffusers made of EPDM compound with 100% rebound memory. 

• Flexible, long-wearing and clog-resistant 9" disc membrane diffusers
  
• Diffusers are highly efficient even during low or moderate air flow
• FlowControl™ technology equalizes airflow to each disk 
• Energy-efficient die-cut perforations with a "Delta" surface pattern increase active surface area and aeration efficiency. 
• Lipped Designed to prevent settling into soft bottom sediments
• StableTrak™ technology increases lift velocity
• Includes a 1/2" male fitting for BottomLine tubing connection
• Comes with a five year, no questions asked Vertex® warranty

Made in the U.S.A.

Technical Specifications