Lambro Industries 1422WTP Single Flap Louver Vent 4 in

Product Description

The LAMBRO INDUSTRIES 1422WTP is a single-flap louver vent designed for 4-inch round duct terminations. Constructed from white plastic, it provides a clean, low-profile wall or exterior termination point for dryer exhaust, bathroom exhaust fans, and similar residential ventilation applications. The unit includes an 11-inch tail pipe for direct duct connection. The single-flap damper closes when the connected fan is off, blocking backdraft, pests, and outside air infiltration. Installation requires no special tools and fits standard 4-inch round duct collar openings.

This louver vent is suited for residential applications where a 4-inch round exhaust duct terminates through an exterior wall. Typical installations include dryer vents, bath exhaust fan terminations, and kitchen range hood extensions. The white finish blends with standard exterior trim and siding. The included tail pipe simplifies rough-in by providing a direct coupling point to the duct run without additional fittings.

Key Features

• Single-flap damper closes automatically when airflow stops, limiting backdraft and pest entry
• Includes 11-inch tail pipe for direct connection to 4-inch round duct
• White plastic construction resists moisture and corrosion on exterior surfaces
• Fits standard 4-inch round duct collar openings
• Sold individually; package quantity of 15 units available for multi-unit or contractor purchasing

Compatibility

Designed as an OEM-style replacement and new-installation louver vent for residential 4-inch round exhaust duct terminations.

Installation Notes

Installed by HVAC technicians, plumbers, or general contractors during rough-in or vent-termination work. Before installation, ensure the exhaust fan or dryer is powered down and the duct run is clear. Exterior wall penetration should be sealed around the flange with appropriate weatherproof caulk to prevent moisture intrusion. Follow local building codes and manufacturer guidelines for minimum clearances from windows, doors, and gas appliance flues.

Technical Specifications

• Duct Size: 4 inches
• Tail Pipe Length: 11 inches
• Material: Plastic
• Color: White
• Damper Type: Single Flap
• Weight: 3.15 pounds
• Unit of Measure: Each

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 1422WTP