3M™ Fire Barrier Cast-In Device Height Adaptors are 1-piece extensions that provide up to 4” of additional height to 3M™ Fire Barrier Cast-In Devices. No fasteners are required and installers simply snap the adaptor onto a metallic or non-metallic Cast-In Device. Adaptors adjust to accommodate concrete slab pour depths up to 12” thick. Adaptor/device assemblies are firestop tested up to 3 hours.

Simply a Better Way to Firestop
Save time and money with our versatile 3M™ Fire Barrier Cast-In Device Height Adaptors. These adaptors allow installers to increase the height of 3M™ Fire Barrier Cast-In Devices to accommodate concrete slab pours up to 12 inches (304.8 mm) deep. This one-piece plastic adaptor features fast snap-on attachment to the Fire Barrier Cast-In Device – no tools or fasteners are required. The adaptor can add up to 4 inches (101.6 mm) in height to our Cast-In Devices for both plastic and metal pipes. It can also be modified for special applications in order to accommodate even greater depths.

When used in conjunction with Fire Barrier Cast-In Devices in listed systems, 3M™ Fire Barrier Cast-In Device Height Adaptors are firestop tested up to 3 hours in accordance with ASTM E 814 (UL 1479).

Recommended Applications



Use in conjunction with metallic and non-metallic 3M™ Fire Barrier Cast-In Devices

New construction jobs requiring concrete slabs greater than 8” (203.2 mm) deep

Special applications requiring concrete pour depths over 12” (requires modifications to the adaptor)



Reliable and Affordable Fire Protection
Effective and easy to install, 3M™ Fire Barrier Cast-In Device Height Adaptors are part of our family of fire protection products that offer the broadest, long-lasting solutions for a variety of commercial, industrial and residential applications. As a trusted leader in the fire protection industry, 3M offers a broad line of affordable products designed to meet the most demanding firestop requirements. Find the solution you need from the industry-preferred line of fire protection products.

• Designed for use with 3M™ Fire Barrier Cast-In Devices for firestopping through penetrations
• Adds up to 4 inches (101.6 mm) to height of device for deeper concrete pours
• Easy snap-on assembly saves time and requires no fasteners
• For special applications, adaptors can be modified to accommodate deeper concrete pours
• When used in conjunction with Fire Barrier Cast-In Devices, Height Adaptors are firestop tested for up to 3-hours in accordance with ASTM E 814 (UL 1479)

• Color: Red
• Part Number: 3HA
• Product Type: Adapter