Minerallac 67744 Foam Conduit Piston 1 Inch

Product Description

The MINERALLAC 67744 is a 1-inch foam conduit piston designed to seal conduit runs against air infiltration, moisture, and pests. The foam piston is inserted into a conduit end after wires are pulled, creating a reliable barrier at the conduit opening. This type of fitting is a standard component in electrical rough-in work on residential and light commercial projects. Electricians use foam conduit pistons to meet code requirements for air sealing at conduit penetrations, particularly where conduit transitions between conditioned and unconditioned spaces.

This piston fits 1-inch conduit and is suited for use in new construction and retrofit installations. It is commonly installed at panel knockouts, junction boxes, and conduit stubs where an airtight seal is required after wire pulls are complete. The lightweight foam construction allows quick installation without tools, making it practical for high-volume rough-in work.

Key Features

• Sized for 1-inch conduit openings
• Foam construction provides a compressible, form-fitting seal
• Seals against air infiltration, moisture intrusion, and pest entry
• Lightweight at 0.04 pounds for easy handling and bulk carrying on the job
• Tool-free installation for fast deployment during rough-in

Compatibility

Designed as an OEM-style fit for 1-inch conduit applications in residential and light commercial electrical installations.

Installation Notes

Licensed electricians typically install foam conduit pistons as part of conduit rough-in or closeout. De-energize all circuits in the affected conduit before completing the seal. The piston should be inserted after the wire pull is finished and before wall or ceiling finish materials are applied. Refer to applicable NEC requirements for conduit sealing at fire-rated or energy-code-required assemblies.

Technical Specifications

• Conduit Size: 1 inch
• Weight: 0.04 pounds
• Material: Foam
• UPC: 08593767744

Standard Information

• Brand: MINERALLAC
• Manufacturer Part Number: 67744