In this video, we showcase three innovative firestop features that make HoldRite HydroFlame Pro Series Sleeves stand out from the rest. When it comes to plumbing innovation HoldRite is always there to support you. Our newest line of firestop sleeves are no different. HoldRite HydroFlame Pro Series is a cast-in-place firestop system designed to save installers time, installed labor costs and best of all, sleeves are available at your distributor of choice nationwide.