Description
A typical flexible-to-metal-duct connection detail for HVAC ductwork, showing how flexible (flex) duct is joined onto a rigid sheet-metal duct spigot so it cannot pull off or leak. The flex is pushed over the metal spigot past its swage bead and clamped with a 10mm-wide zinc-plated worm-drive strap, with duct tape added over the joint if required – the standard airtight connection between the two duct types.
It is a reusable mechanical-services standard you drop onto a duct layout wherever flex connects to hard duct, and size to the spigot diameter.
See also the flexible duct support and the flexible duct specification in the building services details category. A free AutoCAD DWG download.
