This video shows how to properly install the Hilti CP 644 firestop collar according to DIN approval.
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The Hilti CP 644 is a fire protection collar for re-fitting with a housing made of galvanized sheet steel. It protects existing pipe penetrations against fire and smoke and can be uninstalled. The hook positioning is flexible thanks to an easy attachment. It's applicable for insulation of combustible pipes with a diameter of 32 to 250 mm in fire-rated walls and ceilings.
