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Firestopping of Horizontal Plumbing Penetrations


Clients task contractors with installing systems that help keep their buildings and occupants safe. In terms of commercial, multi-family or mixed-use projects, one of the most important fire prevention mechanisms is through-penetration firestop systems.

What Is Firestopping?

Firestopping is a process whereby certain materials, some of them specifically manufactured, are used to resist (or stop) the spread of fire and its byproducts through openings made to accommodate penetrations in fire-rated wall, floors and floor/ceiling assemblies. Firestopping comprises three elements; a fire-rated assembly (a floor or wall), firestop material (typically fire caulking or intumescent material) and a penetrating item such as a plumbing pipe or electrical cables/conduits.

The purpose of firestopping is to reduce the spread of fire and smoke through compartmentation. Firestopping fills openings, holes, and voids (annular space) in fire-rated walls and floors and is intended to restore the hourly rating of fire-rated assemblies breached by penetrants.

One of firestopping’s top benefits is compartmentation. When a fire starts, it can spread quickly throughout a building. This can result in loss of life and major property destruction. In addition, emergency services may not be able to enter a building in time or safely during a fire. Compartmentation helps isolate fire and smoke.

Building codes require firestopping in the following buildings:

  • All new construction projects
  • All new retrofit projects
  • Multi-family residences
  • Offices
  • Schools
  • Hospitals
  • Nursing homes
  • Anywhere fire-rated walls or floors have been penetrated by pipes, cables, conduits or other penetrants.

Benefits of Firestopping

Firestopping can provide numerous benefits:

  • Protection of property and occupants against damage from water, fire, smoke, gases and seismic issues
  • Limitation of building losses in the event of a fire
  • Watertight floor penetrations compartmentation of water damage within the finished building
  • Reduced liability for property owners
  • Adherence to building codes

Common Issues With Firestopping

While firestops are a necessary installation, they can pose multiple headaches for contractors. The firestop installation process can be complex and time-consuming. In addition, many contractors do not receive proper training for firestopping, leading to mistakes that cost time and money later on.

Common firestopping issues include:

  • Use of materials/systems that have not received UL Listing
  • Use of combustible, expandable materials such as mortar, concrete, and foam
  • Components improperly installed
  • Lack of understanding of UL Listed systems

HoldRite HydroFlame Firestop Systems

Firestop installation


HoldRite HydroFlame Firestop Systems provide numerous benefits for plumbing contractors looking for an easy-to-install firestopping solution, including:

  • UL Listed firestop systems, meeting and exceeding building code requirements for multiple municipal and state regulations.
  • Significantly faster installation time, helping contractors implement firestops 6 times faster than makeshift methods.
  • Telescoping sleeves, which eliminate the need to cut sleeves on the job site, saving you time and money.
  • Locator whiskers, helping contractors easily find buried sleeves after concrete pour.
  • Accessibility, with many HoldRite HydroFlame Firestop Systems available at local distributors across the country.
  • W-Rating out of the box, preventing water damage that can occur with makeshift installations.

The HoldRite HydroFlame Pro Series is a cost-effective, time-saving solution for contractors looking for effective firestop systems. Are you ready to invest in HoldRite HydroFlame firestop systems? Contact HoldRite today to receive a free quote and find a distributor near you.