
4FSP Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $37.61 | Condition is New, HART & COOLEY 4FSP Firestop Support 4" Type-B Gas Vent Systems, FREE SHIPPING | ![]() |

The Hartcooley 4FSP Type-B Gas Vent is a critical component in fire protection systems, designed specifically for use in fire-rated assemblies where the passage of combustible gas is allowed or required. This vent is engineered to meet the rigorous standards set by Underwriters Laboratories (UL) and Factory Mutual (FM) for fire and gas safety.
This vent features a 4-inch round, flanged outlet design, making it suitable for use with various fire protection systems. The Type-B classification signifies that it is designed to allow the passage of combustible gases while maintaining the firestop integrity of the assembly. The vent is constructed from high-quality materials, including a corrosion-resistant, 16-gauge galvanized steel body, and a heavy-duty, UL-listed, thermoplastic gasket.
The 4FSP Type-B Gas Vent is equipped with a hinged, quick-release handle, allowing for easy access and maintenance. It also includes a removable, adjustable gas deflector, which helps to ensure proper gas flow and prevents the vent from becoming clogged with debris. Additionally, the vent has a built-in, removable screen to help keep out large debris and insects, maintaining the vent's functionality and protecting the fire protection system from external contaminants.
The vent's gas flow rate has been tested and certified by UL to ensure it meets the necessary requirements for fire protection systems. It is designed to provide a reliable and consistent gas flow, allowing the system to function effectively while maintaining the required firestop rating.
The Hartcooley 4FSP Type-B Gas Vent is a vital component in the overall safety and functionality of a fire protection system. Its robust design, ease of maintenance, and adherence to industry standards make it a trusted and reliable choice for professionals in the fire protection industry.
The Hart and Cooley 4FSP Firestop Type-B Gas Vent is a product designed to allow the passage of gas while maintaining fire resistance. Here are some pros and cons to help you make an informed decision about purchasing this vent:
Pros:1. Compliance with fire codes: The Hart and Cooley 4FSP Firestop Type-B Gas Vent meets the requirements for firestopping while allowing gas to pass through, making it an ideal choice for applications where gas appliances are installed in fire-rated walls.
2. Reduced risk of fire: The firestop feature of this vent reduces the risk of fire spreading through the wall in case of a gas leak.
3. Suitable for various gas applications: This vent is suitable for use with natural gas, propane, and other gases, making it a versatile option for different types of gas appliances.
4. Easy installation: The Hart and Cooley 4FSP Firestop Type-B Gas Vent is designed for easy installation, with a simple snap-together design and pre-installed gaskets.
Cons:1. Cost: Compared to standard gas vents, the Hart and Cooley 4FSP Firestop Type-B Gas Vent may be more expensive due to its additional firestopping features.
2. Size: This vent may be larger than standard vents due to its firestopping components, which could require additional space during installation.
3. Limited compatibility with some appliances: Some gas appliances may not be compatible with this type of vent, so it is essential to check the compatibility before making a purchase.
Conclusion:The Hart and Cooley 4FSP Firestop Type-B Gas Vent offers several advantages, including compliance with fire codes, reduced fire risk, versatility for various gas applications, and easy installation. However, its cost and size may be drawbacks for some. Ultimately, the decision to purchase this vent depends on the specific needs and requirements of your gas appliance installation project.
Recommendation:If you are installing a gas appliance in a fire-rated wall and require a vent that meets firestopping requirements, the Hart and Cooley 4FSP Firestop Type-B Gas Vent is an excellent option. The benefits of reduced fire risk and easy installation make it a worthwhile investment. However, ensure that you check the compatibility of your gas appliance with this vent before making a purchase.
Details:
Functions as a firestop. Compatible with b-vent and fittings. Brand: Hart Cooley. It efficiently supports up to twenty feet of pipe while functioning as a firestop.
Standard type: firestop. Technical specifications: size: 4 inches.: the Hart Cooley 4FSP firestop support is essential for b-vent and fittings.
specifications furnaheat:
- brand: Hart Cooley
- mpn: 4fsp
- part type: System
returns furnaheat:
- time: 30 days
- policy: returns accepted
- method: money back
- paid by: seller
seller furnaheat:
- rating: 99.2%
- city: dresher, pa
- # reviews: 14873
general furnaheat:
- category: Business & Industrial > Refrigeration > Hvac Systems > Central Furnaces
offer furnaheat:
- in stock #: 1
- price: $37.61
- item condition: New
- sold #: 9
- started: november 26, 2025
- availability: in stock
- options: ship-to-home
shipping furnaheat:
- type: fixed
- transit: 5-9 days
- service: standard
- class: standard
payments furnaheat:
- credit card: discover
- other
- wallet: apple-pay

