How to Install Fire Collars (Complete Guide – Australia)

Date Posted:24 July 2026 

 

A Detailed guide to installing fire collars

Installing fire collars correctly is critical to maintaining fire-rated walls and floors in accordance with Australian Standards. This guide explains exactly how to install fire collars, avoid common mistakes, and ensure compliance with AS 1530.4 and NCC requirements.

Click here for 5 simple steps for installation of Fire Collars

What Are Fire Collars?

Fire collars are passive fire protection devices installed around combustible pipes such as PVC, HDPE, and PP. When exposed to fire, the intumescent material expands and crushes the pipe, sealing the penetration to stop fire and smoke spread.

This is essential for maintaining the Fire Resistance Level (FRL) of walls and floors.

Tools & Materials Required

  • Correct size fire collar
  • Fire-rated sealant
  • Metal anchors (no plastic fixings)
  • Drill and drill bits
  • Screwdriver or impact driver
  • Measuring tape and marker
  • Personal protective equipment (PPE)

Important: Always install fire collars exactly as per tested system specifications.

Step-by-Step: How to Install Fire Collars

1. Inspect the Pipe Penetration

Before installing your fire collar, check the penetration:

  • Ensure the annular gap is within approved limits
  • Remove dust and debris
  • Seal large gaps using fire-rated sealant

2. Select the Correct Fire Collar

  • Match collar size to pipe diameter
  • Confirm compatibility with PVC, HDPE, or PP pipes
  • Ensure suitability for wall or floor installation

Using the wrong size collar is a major compliance failure.

3. Install the Fire Collar Around the Pipe

  • Open the collar using the locking mechanism
  • Wrap tightly around the pipe
  • Secure the latch

Most fire collars are retrofit, meaning they can be installed after the pipe is already in place.

4. Position the Fire Collar Correctly

  • Floor penetrations: Install on the underside of the slab
  • Wall penetrations: Install on both sides of the wall

5. Fix the Collar to the Structure

  • Use all fixing lugs provided
  • Secure with metal anchors only
  • Ensure tight, flush installation

Do not use plastic anchors.

6. Seal Around the Penetration

7. Final Inspection & Compliance Check

  • Confirm correct installation location
  • Check fixings and tight fit
  • Verify compliance with tested system
  • Document installation if required

Types of Fire Collar Installations

Retrofit Fire Collars

Retrofit fire collars are installed after pipes are already in place. They are the most common solution for existing buildings and renovations.

Cast-In Fire Collars

Cast-in systems are installed before concrete is poured and are typically used in new construction projects.

Common Fire Collar Installation Mistakes

  • Incorrect collar size
  • Missing or incomplete fixings
  • Installing only one side of a wall
  • Using plastic anchors
  • Oversized unsealed penetrations
  • Not following tested system specifications

Most failures are caused by installation errors rather than product issues.

Australian Standards & Compliance

All fire collars must comply with:

  • AS 1530.4 – Fire resistance testing
  • National Construction Code (NCC)

Installations must match tested configurations to maintain compliance.

Pro Tips for Installers

  • Install fire collars during construction, not after
  • Coordinate with plumbers to minimise oversized penetrations
  • Keep a penetration schedule for compliance tracking
  • Always follow manufacturer installation details

Frequently Asked Questions

Do fire collars need to be installed on both sides of a wall?

Yes, for wall penetrations fire collars are typically required on both sides to maintain the fire rating.

Can I install a fire collar after the pipe is installed?

Yes, most fire collars are designed for retrofit installation.

What pipes require fire collars?

Combustible pipes such as PVC, HDPE, and polypropylene require fire collars when passing through fire-rated elements.

Are fire collars required in Australia?

Yes, under the NCC, fire collars are required where combustible services penetrate fire-rated walls or floors.

Conclusion

Correctly installing fire collars ensures compliance, protects lives, and prevents fire spread. Whether you're working on a residential or commercial project, following tested systems and proper installation methods is essential.

Explore our full range of fire collars and fire stopping products to ensure your next project meets Australian standards.