Lambro Industries 143WTP Under Eave Vent 4 Inch

Product Description

The LAMBRO INDUSTRIES 143WTP is a 4-inch white plastic under eave vent designed to terminate dryer exhaust or ventilation ductwork through a soffit or eave overhang. It includes a 3-inch tail pipe and a built-in weather damper that closes when the system is not operating, blocking backdrafts, pests, and moisture infiltration. This type of vent is typically installed by HVAC technicians or sheet metal contractors as part of a residential dryer exhaust or bath fan exhaust system. The white plastic construction blends with standard soffit materials and resists corrosion in outdoor exposure.

This under eave vent is suited for residential applications where duct termination through a vertical or angled soffit face is required. It is commonly used on dryer exhaust runs and bath or kitchen exhaust fan systems where a standard wall cap is not practical due to roof overhang geometry. The 3-inch tail pipe allows direct connection to 3-inch round duct, and the weather damper provides passive backflow control without requiring a motorized actuator. This vent ships in a package quantity of 4 units.

Key Features

• 4-inch face opening sized for standard residential exhaust termination
• Includes 3-inch tail pipe for direct duct connection
• Built-in weather damper blocks backdrafts and pest entry when system is idle
• White plastic construction resists corrosion and blends with standard soffit finishes
• Designed for soffit or eave installation where wall termination is not feasible
• Sold in a package of 4 units

Compatibility

Designed as an OEM-style replacement or new-installation termination fitting for residential dryer exhaust and bath fan exhaust duct systems using 3-inch round duct connections.

Installation Notes

Installation is typically performed by an HVAC technician or licensed contractor following local mechanical codes and manufacturer duct termination requirements. Power down or disconnect the exhaust appliance before cutting the soffit opening and securing the vent. Seal the flange to the soffit surface with an appropriate exterior-grade sealant to prevent moisture intrusion. Verify that the weather damper swings freely after installation and is not obstructed by insulation or debris.

Technical Specifications

• Face Opening Diameter: 4 inches
• Tail Pipe Diameter: 3 inches
• Material: Plastic
• Color: White
• Weight: 4.2 pounds
• Package Quantity: 4 units

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 143WTP