The 3M™ Fire Barrier Cast-In Tub Box Assembly 3TB creates a void on the top surface of a concrete slab for plumbing access. Fastens directly to a two-inch (50.8 mm) 3M™ Fire Barrier Cast-In Device for metallic pipes.The 3M Fire Barrier Cast-In Tub Box Assembly 3TB , when used in conjunction with the 3M Fire Barrier Cast-In Device, accommodates concrete thickness as thin as 4-1/2 in. (114.3 mm) and pipe sizes from 1-1/2 inch to 2 inch (38.1 mm to 50.8 mm). Available with 2 in. (50.8 mm) or 3 in. (76.2 mm) foam insert depending on desired depth of void. Note: The 3M Fire Barrier Cast-In Tub Box Assembly 3TB is used specifically with a 2 inch 3M Fire Barrier Cast-In Device for Metallic Penetrations. When used together, there may be instances that allow for non-metallic penetrants to pass through the device - see system details for approved penetrants.
Accommodates 1-1/2 in. and 2 in. pipe (38.1mm and 50.8 mm)
annular space allows for hassle-free pipe installation
Easily adjusted height accommodates concrete thickness from 4-1/2 in. to 8 in. (114.3 mm to 203.2 mm)
Easy-to-install
Factory made
Firestop tested for up to three hours
helps assure consistent quality
in accordance with ASTM E 814 (UL 1479)
Red colour easily identifiable as fire-rated
UL Classified
universally recognized independent test agency
when used in conjunction with a two-inch (50.8 mm) 3M™ Fire Barrier Cast-In Device for metallic and non-metallic penetrations
