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White plastic under-eave vent with damper and tail pipe

Lambro Ind.

Lambro Ind. 143WTP 4-Inch White Plastic Under Eave Vent with Damper and Tail Pipe

SKU CH-RZ26-BBF99

A white plastic under-eave vent with a weather damper and 3-inch tail pipe for 143 installations

  • Weather damper blocks outside elements with opening and closing flaps
  • Low profile design fits discreetly under eaves
  • Three inch tail pipe enables through the eave installation
  • Suitable for new or replacement vent installations
  • Manufactured in the United States

Product Purpose

The Lambro 143WTP is a 4-inch white plastic under-eave vent designed for residential attic ventilation. It features an integrated weather damper with opening and closing flaps that block rain, snow and pests while allowing airflow. A 3-inch tail pipe enables through-the-eave installation for new builds or replacement projects.

Ideal Use Cases

This vent suits homeowners and contractors needing a low-profile intake or exhaust point beneath roof eaves. It works for standard 4-inch duct connections where a gravity-operated damper is preferred. Buyers who require powered ventilation, larger duct diameters, metal construction or fire-rated assemblies should look at alternative products.

Installation Notes

Mounting requires separate screws and clamps, which are not included in the package. The low-profile design fits tight soffit spaces, but installers must ensure the tail pipe aligns cleanly through the eave cut-out. Common issues include forgetting to buy fasteners and misaligning the damper hinge, which can prevent the flaps from sealing properly.

Highlights

  • Weather damper blocks outside elements with opening and closing flaps
  • Low profile design fits discreetly under eaves
  • Three inch tail pipe enables through the eave installation
  • Suitable for new or replacement vent installations
  • Manufactured in the United States

Specifications

No published specifications for this item yet.

Questions about this item

What mounting hardware do I need to secure the 143 vent?

Installation screws and clamps are sold separately, so you must supply those to fasten the unit to the eave.

Will the weather damper still close properly if I connect it to an existing rigid duct?

The low-profile design and 3 in. tail pipe allow it to join standard ductwork while the flaps continue to block outside elements.

How can I confirm the damper is operating correctly after I fit the 143 vent?

Feel for airflow exiting the tail pipe when the system runs and verify the flaps shut tightly once the fan stops.

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