Duravent 04VT B-vent Cap 4 Inches High Wind Top

Product Description

The DURAVENT 04VT is a B-vent termination cap engineered for 4-inch vent pipe in high wind environments. It mounts at the top of the vent stack and resists downdrafts that can disrupt combustion appliance draft. The high wind design maintains consistent negative pressure in the flue, helping Category I gas appliances vent reliably even during gusting conditions. Licensed HVAC technicians and gas fitters install this cap as a final component in Type B vent systems serving furnaces, boilers, and water heaters.

This cap is suited for residential and light-commercial Category I gas appliance venting applications where wind-induced backdrafting is a service concern. It is installed at the vent termination point on rooftop penetrations and is compatible with 4-inch B-vent pipe systems. It is a direct replacement option when an existing termination cap is damaged, corroded, or fails to maintain adequate draft in exposed roof locations.

Key Features

• High wind top design reduces downdrafts and stabilizes flue draft
• Fits 4-inch Type B vent pipe
• Functions as a vent termination cap for Category I gas appliance systems
• Rooftop installation position protects the flue opening from wind-driven rain and debris

Compatibility

Designed as an OEM-style replacement termination cap for 4-inch Type B vent systems used with Category I gas appliances such as natural gas or propane furnaces, boilers, and water heaters.

Installation Notes

Installation should be performed by a licensed HVAC technician or gas fitter in accordance with the appliance manufacturer instructions and local mechanical codes referencing NFPA 54 or the International Fuel Gas Code. Shut down the gas appliance and allow the vent system to cool before handling any vent components. Secure the cap per manufacturer guidelines and verify that the vent termination clearances meet applicable code requirements for proximity to roof surfaces, eaves, and air intakes.

Technical Specifications

• Pipe Size: 4 inches
• Vent Type: Type B (B-Vent)
• Application: Category I gas appliance venting
• Design: High wind top

Standard Information

• Brand: DURAVENT
• Manufacturer Part Number: 04VT