Black Plastic Square Flange Connector – Air Ducting Made Easy

Keep your ventilation system running smoothly with this durable Black Plastic Square Flange Connector. Available in four popular sizes — 75mm, 100mm, 120mm, and 150mm — this straight flange fitting is the ideal solution for connecting round air ducts to walls, ceilings, or equipment panels. Whether you're setting up a grow room, bathroom extractor, kitchen ventilation, or HVAC ducting, this connector delivers a secure, low-resistance airflow connection every time.

Key Features

High-Quality ABS Plastic – Lightweight yet strong, with excellent corrosion resistance for long-lasting performance in humid or dusty environments.
Smooth Interior Surface – Minimises air resistance and turbulence for efficient airflow throughout your ducting system.
Square Flange Plate – Flat base design makes wall mounting straightforward, creating a clean, professional finish.
Versatile Sizing – Choose from 75mm, 100mm, 120mm, or 150mm diameter to match your existing duct work.
Dual-Purpose Design – Suitable for use as both an air inlet and air outlet in indoor ventilation setups.
Universal Compatibility – Connects standard round ducts to flat surfaces such as walls, floors, and ceilings.
Easy Installation – Simple push-fit connection with a mounting flange for secure wall fixing.

Specifications

Material: ABS Plastic
Colour: Black
Available Diameters: 75mm / 100mm / 120mm / 150mm
Style: Square Bottom Straight Flange
Application: Air inlet / outlet, wall ducting, ventilation equipment
Package Includes: 1 × Flange Connector
Made in Mainland China

Perfect For

Indoor grow tents and hydroponic setups
Bathroom and kitchen extractor fan installations
HVAC and air conditioning duct connections
Workshop and garage ventilation systems
Home and commercial air ducting projects

For guidance on indoor air quality and ventilation best practices, visit the EPA Indoor Air Quality Resource.

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Please note: Minor measurement variations may occur due to manual sizing. Colours may appear slightly different depending on monitor display settings.

Frequently Asked Questions

Q: What sizes does this plastic square flange connector come in?

A: This flange connector is available in four standard duct sizes: 75mm, 100mm, 120mm, and 150mm diameter. Select the size that matches your existing ducting or ventilation equipment for a proper, airtight fit.

Q: What material is the flange connector made from?

A: The connector is made from high-quality ABS plastic, which offers excellent strength, corrosion resistance, and durability — making it suitable for humid, dusty, or chemically mild environments such as bathrooms, kitchens, and grow rooms.

Q: Can this flange connector be used for both air inlet and air outlet applications?

A: Yes. The square flange design is suitable for both air inlet and air outlet applications. It can be wall-mounted as part of a ventilation duct system or used to connect round pipes to flat surfaces in a variety of indoor ventilation setups.

Q: How is the flange connector installed?

A: Simply align the square flange plate against your wall or panel surface, secure it using appropriate fasteners through the flange mounting holes, then connect your round duct to the circular collar. No specialist tools are required for a standard installation.