Abstract: A firestop apparatus includes a sleeve member having a sleeve opening extending between first and second ends and configured to receive a conduit member. The second end of the sleeve member has a sleeve member coupling portion with at least one sleeve fastener aperture. An intumescent collar member may be adjacent the second end of the sleeve member. The collar member has an opening aligned with the sleeve opening to receive the conduit member. The collar member is expandable from a non-expanded configuration to an expanded configuration, in which the intumescent collar material expands to seal against the conduit member. The collar member has at least one collar fastener aperture aligned with the at least one sleeve fastener aperture. At least one fastener passes through the at least one sleeve fastener aperture and the at least one collar fastener aperture to fasten the collar member to the sleeve member.