Red Arrow Represents (Metal on Metal) Bracketed System where Stress Points exist and where failure and Leaks start to occur.
This is where the Prochem, the Manufacturer, is Struggling to bring stability to the Coil by Dangerously Imposing Metal Brackets connected to the Outside Casing as well as individual Layer Tubing. Expansion and Vibrations will eventually give way anytime to Leaks and at the worse time, right in the middle of your Cleaning Job!
Introducing some important Facts about the 'OLD ART' Conventional Helical Spiral Wrap Tubing, where the Housing creating Enormous Energy Loss.
LOSS OF HEAT Through Outer Spiral Layer and Heat Energy Conducted from Tubing / Bracket to outside Housing