Overview of ATS Joints
Evolution of ATS Joints
Non-FM FRP Vinyl Ester Bell & Spigot Joint – NOT ATS
(Sprinklers Required per Codes)
![](https://atsduct.com/wp-content/uploads/2017/09/non-fm.jpg)
ATS Mark V™ Duct Bell & Spigot Joint – 1980’s
![](https://atsduct.com/wp-content/uploads/2017/09/mark-v.jpg)
ATS Standard Mark VIII™ Joint – ca. 1989
w/Smooth Slip Collar
![](https://atsduct.com/wp-content/uploads/2017/09/mark-viii.jpg)
ATS 4910CR Duct System with Chembond™ Joint
w/ Internal Beaded Slip Collar™
1994–2002
![](https://atsduct.com/wp-content/uploads/2017/09/4910cr.jpg)
ATS H-Collar
2003 – Present
![](https://atsduct.com/wp-content/uploads/2017/09/h-collar.jpg)
ATS ISO Flange (patented)
2005 – Present
![](https://atsduct.com/wp-content/uploads/2017/09/iso-flange-1.jpg)