Skip to product information
1 of 7

4 Inch HVAC Duct Manual Volume Backdraft Damper,Stainless Steel Airflow Control Valve With Adjustment Handle,Duct Damper for HVAC Ventilation System (4inch)

4 Inch HVAC Duct Manual Volume Backdraft Damper,Stainless Steel Airflow Control Valve With Adjustment Handle,Duct Damper for HVAC Ventilation System (4inch)

Quantity
Regular price $34.99
Regular price Sale price $34.99
Sale Sold out
  • 24/7 Customer Support
  • Risk-Free 30-Day Returns
  • Fast & Reliable U.S. Shipping

30-Day Hassle-Free Returns

Not satisfied? Return your order within 30 days for a full refund or exchange — simple and easy.

✔ Easy return process

✔ Fast refunds

✔ No hidden conditions

Fast U.S. Shipping

We ship within the United States only — no international delays.

✔ Processing time: 1–2 business days

✔ Delivery time: 3–7 business days

✔ Real-time tracking available

👉 Track your order anytime from the header via Track Order

About This

  • [Stainless Steel Material]:The HVAC Duct Manual Volume Damper body is made from stainless steel material, durable material resists rust and corrosion superbly,ensuring reliable performance even in humid and high-temperature conditions.
  • [Manual Airflow Control]: You can easily adjust ventilation levels and prevent backdraft by using the convenient manual adjustment handle. The duct damper is designed for simple operation from multiple angles, and it helps you maintain optimal room temperature comfort and air quality. For best results,the backdraft damper should be installed in an easily accessible location.
  • [Edge Silicone Sealing]: The Backdraft Damper features an internal rubber seal ring, ensuring reliable airtightness and preventing gas leakage when the valve is closed. Additionally, two external black rubber rings are fitted at both ends, enhancing the seal between the damper and the pipeline. The seal ring design also helps cushion vibrations and absorb shocks, reducing operational noise and energy loss.
  • [Easy Installation]: Step 1: Position & Slide Measure duct dimensions and determine installation location Slide valve body into ventilation duct Step 2: Connect & Secure Connect dual ducts according to airflow direction arrow Fasten damper with duct clamps TIPS: Position operating handle for easy access and visible scale reading Step 3: Test Loosen locking nut→Rotate handle to desired position→Re-tighten locking nut to fix handle position
  • [Wide Range of Applications]: The Manual Damper Primarily used for airflow control in ventilation and air conditioning (HVAC) system ducts. This damper is installed within ventilation system piping to regulate airflow in settings such as commercial buildings;industrial facilities;laboratories.It enables precise airflow direction control and enhances overall system energy efficiency.

Overview

  • Material : Stainless Steel
  • Brand : Aulmscn
  • Item dimensions L x W x H : 5.12 x 3.94 x 6.88 inches
  • Exterior Finish : Stainless Steel
  • Inlet Connection Type : Duct Clamp
  • Outlet Connection Type : Duct Clamp
  • Number of Ports : 2
  • Outlet Connection Size : 4 Inches
  • Number of Packs : 1
  • Smart Home Compatibility : Not Smart Home Compatible
View full details
Is Hard Water or Contaminated WaterDamaging Your Home?
Signs You May Be Experiencing Problems With Your Tap Water
Protect Your Home Appliances
rss_feed
Softer Skin & Healthier Hair
rss_feed
Pure, Better-Tasting Drinking Water
rss_feed
Prevent Costly Hard Water Damage
rss_feed
Reduce Limescale Buildup
rss_feed
Clean Water, Whole Home
rss_feed
Protect Your Home Appliances
rss_feed
Softer Skin & Healthier Hair
rss_feed
Pure, Better-Tasting Drinking Water
rss_feed
Prevent Costly Hard Water Damage
rss_feed
Reduce Limescale Buildup
rss_feed
Clean Water, Whole Home
rss_feed
RO Water Filters Reverse Osmosis Water Filters for Pure Drinking Water
Salt Water Softeners Salt Water Softeners for Powerful Hard Water Treatment
Pure Water. Better Living.

Experience the difference clean, softened water makes in your daily life — from healthier skin to better tasting drinking water.

👉 Softer skin and smoother hair with every shower.

Descaling Solutions Descaling Solutions for Removing Limescale and Mineral Buildup
👉 Enjoy healthier skin and hair with every use.
Water Filter Cleaning Kits

👉 Prevent scale buildup and keep your appliances running efficiently.

Under Sink Water Filters

👉 Softer, brighter clothes that last longer with every wash.

Reverse Osmosis Systems Best Reverse Osmosis Systems for Clean Drinking Water

See the Difference in Your Water — Instantly

Hard water, chlorine, and hidden contaminants can affect your health, skin, and appliances.

Our advanced filtration system removes impurities and delivers clean, safe water throughout your entire home.

Feel the difference in every drop — from your kitchen to your shower.

Impurity Reduction 95%
Chlorine Removal 99%

FAQ

Is installation difficult?
expand_less
expand_more
No. Our systems are designed for easy DIY installation and most homeowners can install them without professional tools. If you need help, our support team is always available.
Do I need a plumber to install the system?
expand_less
expand_more
No plumber is required. The system connects directly to your existing plumbing with simple fittings.
How does this system improve water quality?
expand_less
expand_more
Our filtration system helps reduce common impurities and minerals that cause hard water problems, improving the taste and clarity of your water.
Will this help protect my appliances?
expand_less
expand_more
Yes. Hard water minerals can build up inside appliances. Our system helps reduce scale buildup, helping extend the life of washing machines, dishwashers, and water heaters.
How often do filters need to be replaced?
expand_less
expand_more
Most filters only need replacement every 6–12 months, depending on usage and local water conditions.
Will this improve my skin and hair?
expand_less
expand_more
Many customers notice softer skin and smoother hair after switching to filtered or softened water.
What if I'm not satisfied with the system?
expand_less
expand_more
If you're not completely satisfied, you can return your product within 30 days for a full refund.
Easy to install — no plumber required. Our experts are here if you need help.
Strategic Partner

Unlock Exclusive Offers

Be the first to know about new collections and exclusive offers.

Subscribe Now