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Embedding BlazeMaster® CPVC in Concrete

BlazeMaster® fire sprinkler systems have been successfully installed embedded in concrete for many years. Embedding CPVC within cast-in-place concrete not only provides aesthetic benefits but also eliminates the costs associated with drop ceilings and – when steel pipe is used – fire sprinkler system hangers.

Embedded Concrete Installation Video

 

Installation Instructions

These installation instructions will provide best practices in designing for installation in concrete. Refer to the manufacturer’s installation and design manual for specific listings, approvals and limitations.

  • As the BlazeMaster CPVC is laid out, do not let it come into contact with sharp objects or edges, such as rocks, metal or structural members. Any open pipe ends must be protected from debris or concrete getting into the system.
  • When laying out BlazeMaster CPVC pipe it is best to use straight runs of pipe. However, CPVC pipe is inherently ductile and can be snaked when laid out. This can be useful when some offset from a straight run can help avoid obstacles. Straight runs of pipe will minimize any stress that is exerted on the pipe. When the pipe is embedded in concrete there is no opportunity to relieve any stress once the concrete is poured, so it is important to minimize stress during installation.  
  • Avoid BlazeMaster pipe and fittings systems from coming in contact with construction materials that are incompatible with CPVC. Verify the suitability of a product for use with CPVC with the manufacturer of the chemical additive to confirm chemical compatibility.
  • Prevent wire mesh or reinforcing bars from causing any abrasion damage to the BlazeMaster pipe and fittings systems, especially when pouring the concrete. BlazeMaster pipe and fittings must not be installed in concrete that is to be post tensioned. The post tensioning process can create excessive forces which can damage the BlazeMaster fire sprinkler system.
  • When pipe joints will be covered in concrete, the installation must be pressure tested prior to pouring the concrete. If there will not be any joints covered by concrete, there no need to pressure test the system prior to pouring the concrete.
  • Prior to pouring the concrete, intermittently secure the BlazeMaster CPVC to prevent movement. Nonabrasive, plastic fasteners are good choices for this application. When hangers are used, most metal hangers designed for metal pipe are suitable for BlazeMaster CPVC. Do not use undersized hangers. Select hangers with sufficient load-bearing surface based on pipe size (e.g., 1-1/2 in. hangers for 1-1/2 in. pipe). The hanger must not apply compressive load or have rough or sharp edges that contact the pipe.
  • Be careful that the BlazeMaster CPVC is not damaged by the tools and equipment used to pour and finish the concrete. All standard methods of pouring concrete onto the ceiling construction with concrete pumps or concrete containers followed by compaction with vibrators can be used in combination with BlazeMaster fire protection systems. BlazeMaster CPVC must not come into contact with equipment such as tampers and agitators.
  • As the concrete is poured, ensure that the pipe has not moved from its intended positioning.
  • Thermal expansion and contraction is not an issue for BlazeMaster pipe and fittings that are embedded in concrete. Those forces are relieved in a manner that does not affect the pipe or fittings. However, expansion and contraction must be incorporated in the design of those sections of pipe that are not embedded in concrete. Failure to adequately allow for stress at these points may result in damage to the pipe where it enters and exits the concrete.