In January 2012, Petzl released a statement that withdrew its earlier support for the use of the Shunt as a rope access back-up device. Petzl‘s main concern is the Shunt can be defeated by the user when used with a tow string and lanyard.
In fact there have been accidents caused by users defeating the shunt and losing control on the abseil.
For years the shunt has been widely used in rope access as a back-up device. We have also been using it since 2006 at the TRAKS training center with zero accidents.
Last month we have replaced all our Shunts with the ASAP+ ABSORBICA combo because we believe it’s a much safer way to train and work.
Below is a video which illustrates what a Fall Factor 2 drop can result in with a light (50kg) load on the rope.
Stay safe, use an ASAP + ABSORBICA