BlazeMaster® CPVC Pipe Becomes First Non-Metallic Pipe Approved for Use in Unfinished Basements and Exposed System Risers
BlazeMaster® CPVC pipe and fittings are now Listed by Underwriters Laboratories, Inc. (UL) for use in unfinished basements with exposed solid wood joist installations in accordance with NFPA 13D and in exposed system risers in accordance with NFPA 13D and 13R. BlazeMaster CPVC pipe is the only non-metallic pipe Listed by UL for these applications.
- Unfinished Basements
In one- and two-family dwellings, BlazeMaster CPVC pipe and fittings may be installed in unfinished basements without protection (exposed) in accordance with NFPA 13D for horizontal ceilings utilizing 2 in. x 10 in. or 2 in. x 12 in. solid wood joists on 16 in. centers. When installed exposed, the system must utilize a residential sprinkler head with a maximum temperature rating of 155°F, with deflectors a maximum of 1-3/4 in. below the bottom of the wood joist. Installing the sprinkler head with the deflector 1-3/4 in. below the bottom of the joists accommodated the future addition of a finished ceiling (reference NFPA 13D, Section 4-2.4, 1999 Edition).
There are additional Listing limitations for BlazeMaster CPVC sprinkler systems installed in unfinished basements with exposed solid wood joists, so the manufacturer's installation instructions must be referenced before beginning installation.
BlazeMaster CPVC Now in Combustible Concealed Truss Construction when Space Protected by Central Sprinkler's Model CC1 Sprinkler Head
- Change: Combustible concealed spaces not requiring sprinkler protection by NFPA standards are presently allowed to be piped using BlazeMaster® CPVC. Up to now, BlazeMaster® CPVC could not be used in any combustible concealed spaces requiring sprinkler protection. When using Model CC1 Sprinklers, BlazeMaster® CPVC can now be installed in combustible concealed space requiring sprinklers in open wood truss construction.
BlazeMaster® CPVC Now in Ordinary Hazard Applications
- Change: An exception to Section 3-3.5 of NFPA 13 was implemented in its 1999 edition which allows BlazeMaster® CPVC to protect ordinary hazard rooms of otherwise light hazard occupancies where the room does not exceed 400 ft2. Use the same installation guidelines as used for light hazard installations for both concealed and exposed ordinary hazard applications.
- Benefit: Fewer transitions between BlazeMaster® piping and other piping systems or materials.
- Examples: Light hazard buildings such as schools, apartments and hotels that contain ordinary hazards rooms such as storage areas, laundry facilities, or mechanical rooms that do not exceed 400 ft2.