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Silver steel firestop pathway device, 25 inches wide

STI

STI NEZP433 Smoke and Acoustic Pathway Device 25 in

SKU CH-A4K7-NJDCG

A firestop pathway device for smoke and acoustic sealing, 25 inches wide with four gang plates included

  • ColorSilver
  • MaterialHAWA
  • Smoke and acoustic barrier protects pathways
  • Steel construction provides durable fire-stop performance
  • 25 inch width fits standard pathway dimensions
  • Four gang plates included for quick installation
  • L-rated testing confirms smoke and acoustic compliance

Firestop Pathway 25 Inch

The STI NEZP433 is a smoke and acoustic pathway device designed for facility and traffic safety applications. It provides a firestop pathway measuring 25 inches wide, 4 inches long and 5 1/2 inches high. The silver steel unit includes a four gang plate pack and carries L Ratings Tested standards for smoke and acoustical performance.

Square Steel Installation

The square steel construction fits standard pathway openings and the included gang plate pack simplifies mounting. Installers should verify the exact rough-in dimensions before cutting because the 25 inch width leaves minimal tolerance. Misalignment during fastening is the most common issue and can compromise the smoke seal.

25 Inch Width Constraint

The 25 inch width is the critical specification that determines whether this device fits the designated opening. Builders needing a narrower or wider pathway must select a different model because this unit cannot be trimmed or extended. The 433 model number identifies this exact width configuration.

Highlights

  • Smoke and acoustic barrier protects pathways
  • Steel construction provides durable fire-stop performance
  • 25 inch width fits standard pathway dimensions
  • Four gang plates included for quick installation
  • L-rated testing confirms smoke and acoustic compliance

Specifications

ColorSilver
BrandSTI
MaterialHAWA

Questions about this item

How can I verify the NEZP433 is blocking smoke and sound correctly after installation?

Confirm the steel pathway sits flush in the 4 in by 25 in opening and that the four gang plates cover every cable penetration without gaps.

What components come with the NEZP433 and what must I source separately?

The box includes the silver steel pathway and four gang plates; firestop sealant and mounting fasteners are not supplied.

The listing shows only the 25 in width version — how do I know it fits my opening?

Measure the rough opening; this device requires exactly 25 in width, 4 in length and 5 1/2 in height.

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