The best PVC pipe fire collar depends on the pipe size and the tested firestop assembly where it will be installed. HoldRite HydroFlame collars cover several plastic-pipe materials in 1½-, 2-, and 3-inch sizes, while the Abesco Z240 is a 4-inch option and RectorSeal Metacaulk is a 6-inch collar described for limited-access areas. Confirm the pipe, assembly, and installation requirements before choosing.
| Product | Best suited for | Listed size |
|---|---|---|
| HoldRite HydroFlame HF-PC-0150 | 1½-inch pipe applications | 1½ inches |
| HoldRite HydroFlame HF-PC-0200 | 2-inch pipe applications | 2 inches |
| HoldRite HydroFlame HHF-PC-0300 | 3-inch pipe applications | 3 inches |
| Abesco Fire Z240 | 4-inch pipe applications | 4 inches nominal |
| RectorSeal Metacaulk 66354 | 6-inch pipe and limited-access areas | 6 inches |
HoldRite HydroFlame 1½-Inch Collar
This HoldRite HydroFlame collar is best for a firestop application calling for the listed 1½-inch size and a compatible plastic pipe. The manufacturer’s provided features identify PVC, CPVC, FRPP, ABS, and PVC/ABS foam core insulation as compatible materials.
It is a prefabricated firestop sleeve for open and closed through-penetration firestop sealants. Its highly intumescent material is described as quick to install and requiring no curing time. Choose this model when the project documents call for a 1½-inch collar of this type.
Check before buying: The listed size is specific; do not assume it fits another pipe size or an unverified wall or floor assembly. Confirm installation details against the applicable firestop system.
HoldRite HydroFlame 2-Inch Collar
For a 2-inch application, this HydroFlame model offers the same prefabricated sleeve format and material compatibility as the 1½-inch version. The listed compatible materials are PVC, CPVC, FRPP, ABS, and PVC/ABS foam core insulation.
This collar is best for buyers who need a 2-inch size with a highly intumescent material and a product described as requiring no curing time. Its stated suitability for open and closed through-penetration firestop sealants is useful when checking product fit against project requirements.
Check before buying: The product information does not establish that it suits every assembly. Verify the required system, pipe material, and installation method before use.
HoldRite HydroFlame 3-Inch Collar
This 3-inch HydroFlame collar is best for projects that require that specific nominal size and one of the listed compatible plastic-pipe materials: PVC, CPVC, FRPP, ABS, or PVC/ABS foam core insulation. It is prefabricated for open and closed through-penetration firestop sealants.
The product features describe the material as highly intumescent, quick to install, and free of curing time. Select it over smaller HydroFlame options when the firestop detail specifies a 3-inch collar; its shared material features make it easier to compare with the 1½- and 2-inch models.
Check before buying: Confirm that the project calls for this size and that the exact assembly requirements match. Product features alone do not confirm suitability for every installation.
Abesco Fire Z240 4-Inch Collar
The Abesco Fire Z240 is best for a nominal 4-inch pipe application where the specified assembly is suitable for this collar. Its product details list a 5.5-inch outside diameter and one piece. The collar is described for sealing PVC, CPVC, and ABS pipes through 1- and 2-hour fire-rated concrete walls and floors.
According to the supplied features, it is suitable for common construction types including concrete, concrete block, and gypsum drywall assemblies, and for Schedule 40 plastic pipes in closed or vented DWV conditions. Its intumescent material is encapsulated in a steel body and positioned to expand toward the heat source.
Check before buying: Confirm nominal pipe size, outside dimensions, and the applicable assembly. The listed details do not establish compatibility with every pipe material or construction.
RectorSeal Metacaulk 6-Inch Collar
This RectorSeal Metacaulk collar is best for a 6-inch plastic-pipe application, especially where installation access is limited. The product information lists PVC, CPVC, ABS, PVC/ABS foam core, FRPP, and PP as tested pipe materials. It is described as prefabricated for open or closed through-penetration firestop systems.
The supplied specifications state UL classification for open and closed pipe systems and FBC system compatibility. They also describe use on concrete floors and walls up to 3-hour rated, gypsum walls up to 2-hour rated, and wood floors up to 2-hour rated. Check the exact assembly documentation for the intended installation.
Limitation: The product information says not to use this collar in environments with long-term exposure to rainfall or saltwater spray.
Buying Guide: How to Choose a PVC Pipe Fire Collar
Which collar size should you select?
Start with the nominal pipe size and the firestop system requirements, not the collar’s appearance. This selection includes 1½-, 2-, 3-, 4-, and 6-inch options. The Abesco listing also provides an outside diameter, which is distinct from its nominal size. Verify dimensions and required clearances against the product and assembly documentation.
Does the pipe material matter?
Yes. Confirm that the collar’s listed materials include the pipe material being used. The three HoldRite options list PVC, CPVC, FRPP, ABS, and PVC/ABS foam core insulation. RectorSeal’s supplied details also list PP. Do not treat one model’s compatibility information as applying to every collar.
What should you check about the wall or floor?
Firestop performance depends on the tested or approved assembly, not just the collar. Check whether the penetration is through concrete, gypsum, wood, or another construction type, and whether the application is open or closed. Follow the project documents and the product’s installation instructions for the specific assembly.
When is a prefabricated collar useful?
Prefabricated collars provide a ready-made component rather than requiring the installer to measure and form collar material on site. The HoldRite listings describe quick installation and no curing time; RectorSeal highlights installation in limited-access areas. These features do not replace required system checks or installation steps.
Frequently Asked Questions
What does an intumescent pipe collar do?
An intumescent collar contains material designed to expand when exposed to heat. The supplied Abesco description says its material expands toward the heat source to close off a plastic-pipe penetration.
Can I use any PVC fire collar on a CPVC pipe?
No. Choose a collar whose product details list CPVC compatibility and confirm that the specific firestop assembly permits it.
Do these collars fit both open and closed systems?
Several listings describe use in open and closed through-penetration systems. Verify that the exact product and assembly are approved for the intended installation.
Can I install a collar outdoors?
Check the product’s environmental limitations. RectorSeal’s listed information warns against long-term exposure to rainfall or saltwater spray.
Is nominal size the same as outside diameter?
No. Nominal size identifies a pipe or collar size category, while outside diameter is a physical measurement. Check both where dimensions matter.