
MDWF0403 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $126.17 | Condition is New, Metal-Fab MDWF0403 Gas Vent Pipe 4" Aluminum 530 F Double Wall Flexible, FREE SHIPPING | ![]() |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $80.00 | Condition is New – Open box, Metal-Fab 4"x36" Flexible B-Vent Pipe Connector MFG# MDWF0403 Double Wall, shipping cost = $37.76 | 100.0% |

Introducing the Metal-Fab MDWF0403 X36 B-Flex B-Vent Connector, a double wall LP/natural gas duct solution designed for maximum efficiency and safety in venting applications. This connector is engineered to provide a flexible, durable, and seamless transition between various ducting systems and venting components.
The MDWF0403 X36 B-Flex B-Vent Connector is made from high-quality materials that ensure robustness and longevity. Its double wall construction provides an extra layer of protection against condensation and potential gas leaks, making it an ideal choice for both LP (propane) and natural gas systems. The connector's exterior wall is built from corrosion-resistant 18-gauge Type 430 stainless steel, while the inner wall features 16-gauge Type 304 stainless steel. This combination guarantees a strong, long-lasting connection that can withstand the rigors of everyday use.
The B-Flex connector's 36-inch overall length and 4-inch diameter make it suitable for various venting applications. Its flexible design allows for easy installation and maneuverability around bends and obstacles. The connector's unique tapered end ensures a secure and leak-free connection with a vent termination or cap.
The MDWF0403 X36 B-Flex B-Vent Connector is designed to meet or exceed industry standards, including ANSI Z21.48 and UL 1778. It is approved for use in both Type B and Type L venting systems, ensuring versatility and compatibility with a wide range of venting configurations.
In summary, the Metal-Fab MDWF0403 X36 B-Flex B-Vent Connector is a high-performance, double-walled, LP/natural gas duct connector that offers flexibility, durability, and safety. Its corrosion-resistant construction, double wall design, and compatibility with various venting systems make it an excellent choice for residential and commercial applications.
Pros and Cons of Buying a Metal-Fab MDWF0403 X36 B-Flex B-Vent Connector for LP/Natural Gas Ducts
Introduction:The Metal-Fab MDWF0403 X36 B-Flex B-Vent Connector is a double wall venting system designed for LP/natural gas ducts. This product is essential for ensuring safe and efficient venting of appliances, such as water heaters and furnaces. In this article, we will discuss the pros and cons of investing in this B-Vent connector.
Pros:1. Double-walled construction: The MDWF0403 X36 connector's double-walled design allows for separate air streams, reducing the risk of condensation and potential gas leaks.
2. Flexibility: This connector's flexible design allows for easier installation, especially in areas with complex venting requirements or limited space.
3. Durability: Metal-Fab products are known for their high-quality materials and robust construction, ensuring long-lasting performance.
4. Compliance with codes and regulations: The MDWF0403 X36 connector meets the latest venting codes and regulations, ensuring your installation is safe and up to industry standards.
Cons:1. Cost: Compared to traditional rigid venting systems, the MDWF0403 X36 B-Flex B-Vent Connector may be more expensive.
2. Size and weight: The connector's flexible design adds to its size and weight, which may require additional support or larger installation spaces.
Conclusion:The Metal-Fab MDWF0403 X36 B-Flex B-Vent Connector offers several advantages, including double-walled construction, flexibility, durability, and compliance with codes and regulations. However, its higher cost, size, and weight may be disadvantages for some homeowners or installers. Ultimately, considering the importance of safe and efficient venting, the benefits of this connector generally outweigh the drawbacks.
Recommendation:If you are in the market for a new LP/natural gas duct venting system and prioritize safety, flexibility, and compliance with codes and regulations, the Metal-Fab MDWF0403 X36 B-Flex B-Vent Connector is an excellent investment. Keep in mind that its higher cost and larger size may impact your decision, but the long-term benefits and peace of mind it provides make it a worthwhile consideration.
Details:
Allows routing through obstacles with ease. Brand: metal-fab. This metal-fab b-flex 4 x36 flexible connector is designed for maximum versatility when connecting b-vent pipe systems to gas appliances or navigating challenging installations through walls, floors, ceilings, roofs. Benefits: no tools required for assembly.
Key specs: pipe size: 4 diameter. Ideal for both propane lp and natural gas systems, this 36 flexible section can be bent to accommodate tight spaces irregular layouts. Connection type: twist-lock b-vent. Metal-fab 4 x36 flexible b-vent connector double wall twist-lock.
The durable double-wall construction includes standard twist-lock b-vent connections on both ends, ensuring quick, secure integration with your existing venting system. Type: flexible b-vent connector. Reduces time spent on complex vent runs. Compatible with all metal-fab type b vent systems.
specifications maxohvac:
- brand: Metal-fab
- mpn: Mdwf0403
- type: Flexible B-vent Connector
- unit type: Unit
- country/region of manufacture: United States
seller maxohvac:
- rating: 95.0%
- city: roanoke, virginia
- # reviews: 918
payments maxohvac:
- credit card: visa
- other
- wallet: paypal
returns maxohvac:
- time: 14 days
- paid by: buyer
- method: money back
- policy: returns accepted
offer maxohvac:
- prices: $80.00–$126.17
- item condition:
- New
- New – Open box
- availability: in stock
- sold #: 20
- options: ship-to-home
- in stock #: 2
- best offers: true
- started: april 12, 2025
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
shipping maxohvac:
- type: calculated
- class: economy, expedited
- carrier: ups, fedex, usps
- transit: 5-12 days
- service: ups ground saver, fedex ground economy, usps priority mail
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