Skip to main content
Get $25 with Clipsal Resi Max + MAX9 Circuit Protection $250 Spend | FREE Standard Delivery on Clipsal Orders $330 See More

Flat Rate Standard Shipping Only $15.95

100 Day Money Back Guarantee

Australian Customer Service

About Us

07 5428 3044
Australia's #1 Online Electrical Wholesaler | 400,000+ happy customers
Google Reviews
4.9 6,690+ reviews

Search Results:

    There doesn't appear to be any pages that match your search. Try more general keywords, or just ask us!

    Search Results:

    Product Category Suggestions
      Pages

        Sigrist NRD-150 | 150mm Metal Non-Return Damper | Backdraft Valve

        The Sigrist NRD-150 is a 150mm metal non-return damper, designed for use in ducting and HVAC air movement systems. Suitable for standard 150mm ducting, it helps control airflow direction and reduce unwanted backdraft within ventilation systems.

        Operating as a one way airflow valve, the damper helps prevent return air from travelling back through the duct once airflow stops. A built-in soft close buffer helps reduce slamming noise during operation, making it suitable for residential and commercial ventilation setups.

        Sigrist NRD-150 Features

        • 150mm Duct Size: Suits standard 150mm diameter ducting.
        • Metal Construction: Suitable for HVAC and ventilation systems. 
        • Non-Return Airflow: Helps stop reverse airflow in duct runs.
        • One Way Valve: Allows airflow in a single direction only.
        • Soft Close Buffer: Helps reduce damper slamming noise.
        • Ducted System Compatible: Suitable for inline ventilation applications.

        Where to use this Sigrist NRD-150

        • HVAC duct systems requiring one way airflow control.
        • Exhaust fan installations preventing return airflow.
        • Ventilation systems managing backdraft in duct runs.
        • Metal duct installations using 150mm ducting.

        (NRD-150)

        The Sigrist NRD-150 is used to stop unwanted backdraft and reverse airflow in ventilation and ducted exhaust systems.

        It allows air to flow in one direction only and helps stop air returning back through the duct.

        It can help reduce outside air, odours and unwanted airflow entering the system when the fan is off.

        Yes. It helps reduce slamming noise when the airflow stops.

        Yes. It’s commonly installed with exhaust and inline ventilation systems.

        Yes. Sparky Direct stocks the Sigrist NRD-150 with fast dispatch across Australia.

        100-Day Fuss-Free Returns
        We want you to love what you buy—but if you change your mind, that’s okay too. That’s why Sparky Direct offers a 100-day money-back guarantee.

        • Items must be unused, with all parts, accessories, and original packaging.
        • We can’t accept returns if the product is damaged, incomplete, or not in resalable condition.
        • Proof of purchase is required.
        • Return shipping is the responsibility of the customer. 

        If your item isn’t in its original condition, please contact us before returning it—we might save you time and money.

        All products come with a manufacturer’s or supplier’s warranty

        • Warranty starts from the Invoice Date
        • Some suppliers offer in-home warranties and handle claims directly, so you won’t need to uninstall or return the product. Chat with us to check if your product qualifies.
        • Sparky Direct isn’t responsible for losses caused by product failure.
        • Warranties are void if products aren’t installed by a licensed electrician.

        Damaged or Faulty Goods
        If your order arrives damaged or is faulty, let us know within 24 hours.

        • Sparky Direct will pay for return shipping via an emailed return label.
        • If the fault is confirmed, we will send you a replacement item or provide a refund.

        Contact us via our chat to arrange the return.

        Exclusions
        We can’t accept returns for:

        • Items that have been installed, modified, or used
        • Clearance, End of life, Discontinued, or special order items (unless faulty)
        • All PPE Items
        • Goods returned without original packaging or proof of purchase

        How to Request a Return

        1. Contact our customer service team with your order number.
        2. Confirm it’s eligible under our return or warranty policy.
        3. Pack the item securely and return it using a trackable service.
        4. Once we receive and inspect it, we’ll process your refund or replacement.

        Warranty starts from Invoice Date

        Domestic Use: 2 Year
        Commercial Use: 2 Year
        Warranty Method: Return to Sparky Direct

        These specifications and characteristics outline physical, mechanical, electrical details.

        Brand Sigrist Design
        SKU NRD-150
        Model # NRD-150
        Package Weight 1.530kg
        Package Width 0.195m
        Package Height 0.215m
        Package Length 0.185m
        TYPE VALUE
        Type Duct Valve
        Brand Sigrist
        Material Metal
        Diameter (mm) 150

        Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.

        Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.

        Tools sold by Sparky Direct must be used safely and in accordance with the manufacturer’s instructions. Customers are responsible for ensuring they have the necessary knowledge and competence to operate any tool purchased. If you are unsure how to safely or correctly use a tool, do not use it and seek guidance from the manufacturer or a suitably qualified professional.

        Nothing in this clause limits or excludes any rights or guarantees available under the Australian Consumer Law.

        For website terms and conditions https://www.sparkydirect.com.au/terms-of-use

        0.0

        0 Reviews
        5 STARS
        0
        4 STARS
        0
        3 STARS
        0
        2 STARS
        0
        1 STAR
        0
        Be The First To Review This Product!

        Help other Sparky Direct users shop smarter by writing reviews for products you have purchased.

        Write a review

        Related Category Products
        Airvent ECIF50-150 | 150mm Inline Mixed Flow Fan EC 50W | Adjustable Speed
        Airvent ECIF50-150 | 150mm Inline Mixed Flow Fan EC 50W | Adjustable Speed

        $269.50 $245.00 ex. GST

        Sigrist FC-AI-20-20 | 200mm Inline Fan Fastmount Clamp
        Sigrist FC-AI-20-20 | 200mm Inline Fan Fastmount Clamp

        $30.75 $27.95 ex. GST

        ALLVENT MG150-6 | Vortice Punto Ghost 150mm Exhaust Fan
        ALLVENT MG150-6 | Vortice Punto Ghost 150mm Exhaust Fan

        $219.94 $199.95 ex. GST

        Sigrist NRD-200 | 200mm Metal Non-Return Damper | Backdraft Valve
        Sigrist NRD-200 | 200mm Metal Non-Return Damper | Backdraft Valve

        $42.84 $38.95 ex. GST

        Clipsal Airflow 7005A | Window Exhaust Fan, Axial, 150mm, Auto Switch
        Clipsal Airflow 7005A | Window Exhaust Fan, Axial, 150mm, Auto Switch

        $306.21 $278.37 ex. GST

        See Alternative
        Airvent ECIF200-MAX | 200mm Inline Mixed Flow Fan EC 180W | Adjustable Speed
        Airvent ECIF200-MAX | 200mm Inline Mixed Flow Fan EC 180W | Adjustable Speed

        $328.90 $299.00 ex. GST

        Airvent ECHB-150N | 150mm Ceiling Exhaust Fan EC Motor | Backdraft Damper
        Airvent ECHB-150N | 150mm Ceiling Exhaust Fan EC Motor | Backdraft Damper

        $241.94 $219.95 ex. GST

        Clipsal Airflow 7107A | Window Exhaust Fan, Axial, 200mm, Pull-Cord Switch
        Clipsal Airflow 7107A | Window Exhaust Fan, Axial, 200mm, Pull-Cord Switch

        $413.01 $375.46 ex. GST

        See Options