When are firestop collars needed in radon systems?

A Firestop Collar is needed any time a radon vent pipe passes through a fire-rated wall, floor, or ceiling. These collars are installed around PVC pipes and expand during a fire, sealing the opening to contain flames and smoke. Radon mitigation systems often run through multiple levels of a home or building, so meeting fire codes is critical. Firestop collars are commonly required in basements, attics, and multi-unit housing. Without them, your system may fail local inspections or compromise occupant safety. Whether retrofitting an older home or working on new construction, a properly installed firestop collar ensures your radon system is not just effective—but also compliant and safe.