Fire Rated STI Firestop Pathway by E-Z Path®

Completely Smoke & Fire Proof Your Cables - No Maintenance Required

Low Price Guarantee



What's special about this fire rated pathway?

  • Innovative firestopping system will adjust to the number of cables installed for a perfect fit
  • No products need to be removed or replaced to maintain proper seal; the mechanical design eliminates the use of sealant, putty and other products
  • Provides maximum resistance when there is fire or smoke present, whether empty or completely filled
  • Click for More Features
UL Classified

The E-Z Path® STI Firestop systems pathways are raceway devices that are designed to allow cables to go through fire-rated walls without the need for additional firestopping materials. These units are equipped with a built-in fire sealing system which adjusts to the number of cables that are being installed. Once installed in a fire barrier, you can easily and quickly add, remove, or reinstall fire stopping materials.



Series 22
STI-EZD22 Fire-Rated Pathway Device Kit 1.5" W x 1.5" H x 10.5" L 2.0 lbs
Series 33
STI-EZDP33FWS Fire-Rated Pathway Device Kit
(includes device, wallplates, labels)
3.0" W x 3.0" H x 10.5" L 2.69 lbs
STI-EZDP133CWK Fire-Rated Circular Wall Plate Pack
(full kit with 2 circular wall plates)
3.0" W x 3.0" H x 10.5" L 3.5 lbs
STI-EZDP133FK Kick-In Kit with Kick in Plate Pack
(full kit with single kick-in floor plate)
3.0" W x 3.0" H x 10.5" L 3.37 lbs
Series 44+
STI-EZDP44S Fire-Rated Pathway Device Kit w/ Single Wall Plate 4" W x 4-5/8" H x 14" L 9.3 lbs
STI-EZD44S Series 44+ Pathway Only, no mounting brackets or accessories 4" W x 4-5/8" H x 6" L 5.25 lbs
STI-EZDP144FK Fire-Rated Pathway Device w/ Floor Plate Pack Kit 4" W x 4-5/8" H x 14" L 8.8 lbs
44+ Series Accessories
STI-EZRCM44S Clips into the ends of 44+ series, maintains bend radius of exiting cables 1" Bend Radius Control 0.3 lbs
STI-EZD44ES Clips into the ends of 44+ series, extends the cable run 6" 4" W x 4-5/8" H x 6" L 2.5 lbs
STI-EZP144W (2) Wall plates for installing pathways 4" W x 4-5/8" H 2.2 lbs
STI-EZP544W Ganged installation bracket, installed between studs up to 24", mounts up to (5) 44+ series pathways side by side Inside Dimensions: 20" W x 4-5/8" H x 6" L 4 lbs


Not sure which Series will work for you? Check out the Product Selection Guide

  • Whether new construction or retrofit, you are assured protection from fire and smoke with every cable installation
  • Superior resistance to fire and smoke seepage, unlike the standard sleeve and putty systems
  • Rapidly expands once exposed to fire or high heat
  • Intumescent material reacts to the heat and flames by rapidly sealing the pathway and stopping the flow of fire and smoke
  • 4 hour rated floor and wall constructions
  • Remains code compliant at all times, whether it is empty or full
  • UL Classified and FM approved in accordance with ASTM E-814 (UL 1479)
  • One year manufacturer warranty


Series 22

Series 22 EZ PathThis series is created for new or existing cable installations in walls up to 9" thick, and can accommodate up to 24 CAT 5E cables. Pathway can be mounted as a single unit in either a 2" (51 mm) round or a 1.5" (38 mm) x 1.5" (38 mm) square opening.


Series 33

This series is created for new or existing cable installations in walls up to 9" thick, and can accommodate up to 120 CAT 5E cables.


Square wall plate allows a single series 33 pathway to be installed at 3" x 3" square opening

STI EZ Path Circular wall kit, EZDP133CWKEZDP133CWK

Circular Wall Plate Kits allow a single series 33 pathway to be installed in a 4" round opening or a 3" x 3" square

EZ Path floor kit, EZDP133FKEZDP133FK

New or existing cable installations through floors using core drilled openings - kick in floor kit installs a series 33 pathway into a 4" core drilled round opening. Built-in-self locking fasteners securely wedge the pathway into the concrete.


Series 44

This series is ideal for new or existing cable installations up to 10" thick. Series 44 is made for installations thah pass through walls or floors, and holds up to 240 CAT 5E cables. Pathways can be ganged for additional capacity.

EZ Path Series 44 wall kit, EZDP44EZDP44

Designed to allow single series 44 pathway to be installed in a 6" round opening or 4-1/8" x 4-5/8" opening

STI EZ Path 44 Series, EZDP144FKEZDP144FK

Split floor plate kit is designed to allow a single series 44 pathway to be installed in a 6" round opening or a 4 1/8" x 4-5/8" opening - perfect for already installed cables


Cross Section Diagram of Series 44 EZ Path Cableways

cross section of EZ Path Series 44


Shell Composition 0.059" galvanized steel
Cable Loading Area 6 sq in (nom)
Allowable Cable Fill 100% visual
Fire Resistance Ratings 1 and 2 hour
Expansion Begins 350° F (176° C)
Volume Expansion 800%
Sample Cable Volume (CAT5) 120 (nom)
In-Service Temperature ≤ 120° F (49° C)


Fill Capacity Chart

Cable Diameter Pathway Cable Capacity
mm inches EZD22 EZD33 EZD44
3 0.118 78 395 822
3.5 0.138 57 290 604
4 0.157 44 222 462
4.5 0.177 34 175 365
5 0.197 28 142 296
5.5 0.216 23 117 244
6 0.236 19 98 205
6.5 0.256 16 84 175
7 0.275 14 72 151
8 0.314 11 55 115
9 0.354 8 43 91
12.5 0.491 4 22 47
15 0.590 3 15 32
18 0.708 2 10 22
20 0.786 1 8 18
25 0.983 1 5 11
30 1.179 0 3 8
35 1.376 0 2 6

NOTE: The above information is theoretical and is provided for estimation purposes only. Cable types, shapes and diameters may vary and influence these calculations.


Product Selection Guide

  Series 22 Series 33 Series 44+
Application Walls only Walls & Floors Walls & Floors
Height x Width 1.5" x 1.5"
(38mm x 38mm)
3.0" x 3.0"
(76mm x 76mm)
4" x 4-5/8"
(102mm x 118mm)
Length 10.5" (267mm) 10.5" (267mm) 14" (356mm)
Volume Expansion 15X 16X 16X
Can be Ganged no up to 7 up to 5 in wall or 16 in floor
Can be Lengthened no 6" (152mm) increments no
Insert into Cored Hole 2" (51mm) 4" (102mm) 6" (153mm)
Attached to Conduit no 4" (102mm) no
Fire Rated in Walls up to 2 hours up to 4 hours up to 4 hours
Fire Rated in Floors n/a up to 4 hours up to 4 hours
Approx Max Cable Capacity 25 ± 120 ± 244 ±
Approx Max Cable Capacity (Ganged) n/a 840 ± 1220 ±
Approx Max Cable Capacity (Grid) n/a n/a 3904 ± in floors
Shell Composition 0.059" (1.5mm) Galvanized Steel 0.059" (1.5mm) Galvanized Steel 0.059" (1.5mm) Galvanized Steel
Cable Loading Area 1.25 square in (nom) (8.06 cm²) 6 square in (nom) (38.71 cm²) 6 square in (nom) (38.71 cm²)
Allowable Fill 100% visual 100% visual 100% visual
Expansion Begins 350° F (177° C) 350° F (177° C) 350° F (177° C)
CAT5 / CAT6 25 (nom) / 18 (nom) 120 (nom) / 90 (nom)[ 244 (nom) / 175 (nom)
In Service Temperature ≤ 120° F (49° C) ≤ 120° F (49° C) ≤ 120° F (49° C)
Shelf Life No limit No limit No limit
UL Ratings UL 1479 UL 1479 UL 1479
ASTM Ratings ASTM E814 Div 7 07840 - Through-Penetration Firestopping
ASTM E814 Div 18 16050 - Basic Electrical Materials and Methods
ASTM E814 Div 7 07840 - Through-Penetration Firestopping
ASTM E814 Div 18 16050 - Basic Electrical Materials and Methods
ASTM E814 Div 7 07840 - Through-Penetration Firestopping
ASTM E814 Div 18 16050 - Basic Electrical Materials and Methods

WARRANTY: Specified Technologies Inc. manufactures its goods in a manner to be free of defects. Should any defect occur in its goods (within one year), Specified Technologies Inc., upon prompt notification, will at its option, exchange or repair the goods or refund the purchase price.

Limitations and Exclusions: This warranty is in lieu of all other representations expressed or implied (including the implied warranties of merchantability or fitness for use) and under no circumstances shall Specified Technologies Inc. be responsible for any incidental or consequential property damage or losses. Prior to use, the User shall determine the suitability of the product for its intended use, and the User assumes all risks and liability for subsequent use.



Technology Updates




firestop sleeveSTI Split Firestop Sleeve Kits
Ready™ Split Sleeves are designed with a split pathway and come with wall plates which allow them to be implemented around existing cable bundles. These sleeves weigh half of what competing threaded products do, and have fewer parts, which make them the product you need when you are working on ladders or in cramped spaces in rated and non-rated construction zones.

Cable Transit, FirestopAbesco CT120 Cable Transit
The Abesco CT120 Cable Transit is a Through Penetration Firestop Device designed to allow cables to penetrate fire-rated floors and walls.


Kidde Wireless Ionization Smoke AlarmsWireless Ionization Inter-connectable Smoke Alarms - Kidde
Kidde offers the first UL-Listed wireless smoke alarms. The Kidde Wireless System includes battery operated and AC powered alarms to fit almost any residential structure. The Kidde Wireless System is easy to install and only involves a few simple steps.

ME2 Straight Cable TraysM.E.2 Straight Sections
The M.E.2 cable management system is made with sturdy 0.187 diameter zinc plated steel wire that has been welded into a 2 inch x 4 inch grid. M.E.2 cable trays can be cut to size at the installation site.


STI Composite SheetSTI Firestop SpecSeal® Composite Sheets
Specifically created to firestop large and medium-sized openings, this intumescent composite sheet is easy to cut with sheet metal cutting tools, and provides 2 hours of fire protection.

Fire Protection 3M? Fire Barrier Pillow3M™ Fire Barrier Pillow
During a fire, 3M™ Fire Barrier Pillow intumesces (expands) and locks itself into place, completely surrounding the penetrant(s) stopping smoke, fire and toxic gases from spreading to the next room or next floor for the rated time period. They are easy to install and great for retrofit projects. Just remove and replace pillows as needed.

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