Shop Air Backflow Preventer for Ductwork

Sponsored
$28.99
Copkim 4 Pieces 4 Inch Backdraft Damper One Way Airflow Dryer Vent Backflow Preventer Duct Draft Stopper Inline Fan Vent Deflector With 2 Spring
Amazon.com
6
$28.99
Copkim 4 Pieces 4 Inch Backdraft Damper One Way Airflow Dryer Vent Backflow Preventer Duct Draft Stopper Inline Fan Vent Deflector With 2 Spring
Amazon.com
$13.19
Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fans HVAC | Harfington
harfington
$13.19
Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fans HVAC | Harfington
harfington
$14.26
Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fan HVAC | Harfington
harfington
$14.26
Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fan HVAC | Harfington
harfington
$15.87
6" Backdraft Damper, 1 Set Stainless Steel Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamps For Kitchen Bathroom Exhaust Fan |
harfington
$15.87
6" Backdraft Damper, 1 Set Stainless Steel Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamps For Kitchen Bathroom Exhaust Fan |
harfington
$12.57
Backdraft Damper, Metal Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fans HVAC | Harfington
harfington
$12.57
Backdraft Damper, Metal Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fans HVAC | Harfington
harfington
$426.02
Caleffi NA553369 Boiler Trim Kit W/ Check & Backflow Valve, 1" Sweat Air Separator, & 4.4 Gal. Expansion Tank | Supplyhouse.Com
SupplyHouse.com
$426.02
Caleffi NA553369 Boiler Trim Kit W/ Check & Backflow Valve, 1" Sweat Air Separator, & 4.4 Gal. Expansion Tank | Supplyhouse.Com
SupplyHouse.com
$8.77
Backdraft Damper, Metal HVAC Ducting Insert Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fan | Harfington, 1
harfington
$8.77
Backdraft Damper, Metal HVAC Ducting Insert Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fan | Harfington, 1
harfington
$508.95
Resideo TK60PV150PNKP TK60 Boiler Trim Kit W/ 1-1/2" IPS Air Eliminator & Double-Check Backflow Preventer, TK60PV150PNKP | Supplyhouse.Com
SupplyHouse.com
$508.95
Resideo TK60PV150PNKP TK60 Boiler Trim Kit W/ 1-1/2" IPS Air Eliminator & Double-Check Backflow Preventer, TK60PV150PNKP | Supplyhouse.Com
SupplyHouse.com
$19.01
6"" Metal Backdraft Damper Backflow Preventer Draft Blocker Duct Connector
eBay.com
Free shipping
$19.01
6"" Metal Backdraft Damper Backflow Preventer Draft Blocker Duct Connector
eBay.com
$39.46
5 Inch Duct Manual Volume Backdraft Damper,Vent Damper Control Valve,For HVAC
eBay.com
11
Free shipping
$39.46
5 Inch Duct Manual Volume Backdraft Damper,Vent Damper Control Valve,For HVAC
eBay.com
$35.81
Volume Backdraft 4 Inch Airflow Ducting Branch Vent Damper Air Control Valve
eBay.com
Free shipping
$35.81
Volume Backdraft 4 Inch Airflow Ducting Branch Vent Damper Air Control Valve
eBay.com
$2.25
DIG - 3/4' Backflow Preventer, Black (FHT X MHT) - 18-001
Cheap Sprinklers
$2.25
DIG - 3/4' Backflow Preventer, Black (FHT X MHT) - 18-001
Cheap Sprinklers
$234.71
Taco TTK-125T-SEL 1-1/4" Select Near Boiler Trim Kit ,Air Separator, Comb Boiler Feed Valve & Backflow Preventer, 4-1/2 Gal Exp
SupplyHouse.com
2
$234.71
Taco TTK-125T-SEL 1-1/4" Select Near Boiler Trim Kit ,Air Separator, Comb Boiler Feed Valve & Backflow Preventer, 4-1/2 Gal Exp
SupplyHouse.com
$4,512.99
Zurn 3" 375A Reduced Pressure Principle Backflow Preventer 3-375A
Core & Main
$4,512.99
Zurn 3" 375A Reduced Pressure Principle Backflow Preventer 3-375A
Core & Main
$22.99
Uxcell 6" Backdraft Damper Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamp Silver 1 Set
Walmart
Free shipping
$22.99
Uxcell 6" Backdraft Damper Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamp Silver 1 Set
Walmart
$364.87
Groen 146392 Backflow Preventer - Watts - Actuators
Parts Town
$364.87
Groen 146392 Backflow Preventer - Watts - Actuators
Parts Town
$2,776.61
Gaylord 22498 OEM 1in Backflow Preventer
WebstaurantStore
$2,776.61
Gaylord 22498 OEM 1in Backflow Preventer
WebstaurantStore
$141.48
Lafferty Backflow Preventer, 9DM2, 3/4"
Worldwide Janitor
$141.48
Lafferty Backflow Preventer, 9DM2, 3/4"
Worldwide Janitor
$14.39
Uxcell Backdraft Damper, 4 Inch, Ducting Hose Airflow Insert Backflow Preventer Shutter, One-Way Draft Stopper
Walmart
Free shipping
$14.39
Uxcell Backdraft Damper, 4 Inch, Ducting Hose Airflow Insert Backflow Preventer Shutter, One-Way Draft Stopper
Walmart
$1,394.94
Dixon Powhatan Backflow Preventer - BFP200
John M. Ellsworth Co., Inc.
$1,394.94
Dixon Powhatan Backflow Preventer - BFP200
John M. Ellsworth Co., Inc.
$8,543.99
Zurn 6" 350DA Double Check Detector Backflow Preventer 6-350DA
Core & Main
$8,543.99
Zurn 6" 350DA Double Check Detector Backflow Preventer 6-350DA
Core & Main
$140.23
Lafferty Backflow Preventer, 9DM3, 1/2"
Worldwide Janitor
$140.23
Lafferty Backflow Preventer, 9DM3, 1/2"
Worldwide Janitor
$358.45
Watts 009-QT 1 Inch Reduced Pressure Zone Backflow Preventers
Amazon.com
15
Free shipping
$358.45
Watts 009-QT 1 Inch Reduced Pressure Zone Backflow Preventers
Amazon.com
$206.79
DEMA ASSE 1012 Approved Constant Pressure Backflow Preventer With GHT Fittings
Worldwide Janitor
$206.79
DEMA ASSE 1012 Approved Constant Pressure Backflow Preventer With GHT Fittings
Worldwide Janitor
$150.09
Watts 61888 9D 3/4 Backflow Prev 61888
Voomi Supply
97
$150.09
Watts 61888 9D 3/4 Backflow Prev 61888
Voomi Supply
$26.49
6" Backdraft Damper Backflow Preventer Draft Blocker Duct Adaptor Red
Bed Bath & Beyond
20
$26.49
6" Backdraft Damper Backflow Preventer Draft Blocker Duct Adaptor Red
Bed Bath & Beyond
$919.00
Zurn® Wilkins 375XL 1" Reduced Pressure Principle Backflow Preventer, 175 PSI
Global Industrial
$919.00
Zurn® Wilkins 375XL 1" Reduced Pressure Principle Backflow Preventer, 175 PSI
Global Industrial
$19,611.99
Zurn 8" 450DA Double Check Detector Backflow Preventer 8-450DA
Core & Main
$19,611.99
Zurn 8" 450DA Double Check Detector Backflow Preventer 8-450DA
Core & Main
$4,842.00
WATTS 0122772 - HVAC & Filter/Dryer Supplies
Radwell.com
$4,842.00
WATTS 0122772 - HVAC & Filter/Dryer Supplies
Radwell.com
$50.46
Honeywell BP900/U Backflow Preventer
ProSupplyDirect 2
20
$50.46
Honeywell BP900/U Backflow Preventer
ProSupplyDirect 2
$2.25
DIG - 3/4' Backflow Preventer, Grey (FHT X MPT) - 18-002
Cheap Sprinklers
$2.25
DIG - 3/4' Backflow Preventer, Grey (FHT X MPT) - 18-002
Cheap Sprinklers
$79.75
Krowne 21-109L Low Lead In-Line Vacuum Breaker, Prevents Back Siphonage/Backflow, Backflow Preventer
Katom.com
1
$79.75
Krowne 21-109L Low Lead In-Line Vacuum Breaker, Prevents Back Siphonage/Backflow, Backflow Preventer
Katom.com
$471.19
Zurn Wilkins 1-975XL 1" 975XL Reduced Pressure Principle Backflow Preventer
Amazon.com
1
Free shipping
$471.19
Zurn Wilkins 1-975XL 1" 975XL Reduced Pressure Principle Backflow Preventer
Amazon.com
$20.89
$25.89
Uxcell 7" Metal Backdraft Damper Backflow Preventer Draft Blocker Duct Connector Red
Walmart
Free shipping
19% off
$20.89
$25.89
Uxcell 7" Metal Backdraft Damper Backflow Preventer Draft Blocker Duct Connector Red
Walmart
$869.00
Zurn® Wilkins 375XL 3/4" Reduced Pressure Principle Backflow Preventer, 175 PSI
Global Industrial
$869.00
Zurn® Wilkins 375XL 3/4" Reduced Pressure Principle Backflow Preventer, 175 PSI
Global Industrial
$25.99
6" Backdraft Damper Ducting Insert Backflow Preventer Draft Blocker Silver
Bed Bath & Beyond
20
$25.99
6" Backdraft Damper Ducting Insert Backflow Preventer Draft Blocker Silver
Bed Bath & Beyond
See more
See less
    Some results have been hidden because they may be inaccessible to you.Show inaccessible results
    See more images

    Shop Air Backflow Preventer for Ductwork

    Sponsored
    $28.99
    Copkim 4 Pieces 4 Inch Backdraft Damper One Way Airflow Dryer Vent Backflow Preventer Duct Draft Stopper Inline Fan Vent Deflector With 2 Spring
    Amazon.com
    6
    $28.99
    Copkim 4 Pieces 4 Inch Backdraft Damper One Way Airflow Dryer Vent Backflow Preventer Duct Draft Stopper Inline Fan Vent Deflector With 2 Spring
    Amazon.com
    $13.19
    Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fans HVAC | Harfington
    harfington
    $13.19
    Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fans HVAC | Harfington
    harfington
    $14.26
    Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fan HVAC | Harfington
    harfington
    $14.26
    Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fan HVAC | Harfington
    harfington
    $15.87
    6" Backdraft Damper, 1 Set Stainless Steel Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamps For Kitchen Bathroom Exhaust Fan |
    harfington
    $15.87
    6" Backdraft Damper, 1 Set Stainless Steel Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamps For Kitchen Bathroom Exhaust Fan |
    harfington
    $12.57
    Backdraft Damper, Metal Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fans HVAC | Harfington
    harfington
    $12.57
    Backdraft Damper, Metal Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fans HVAC | Harfington
    harfington
    $426.02
    Caleffi NA553369 Boiler Trim Kit W/ Check & Backflow Valve, 1" Sweat Air Separator, & 4.4 Gal. Expansion Tank | Supplyhouse.Com
    SupplyHouse.com
    $426.02
    Caleffi NA553369 Boiler Trim Kit W/ Check & Backflow Valve, 1" Sweat Air Separator, & 4.4 Gal. Expansion Tank | Supplyhouse.Com
    SupplyHouse.com
    $8.77
    Backdraft Damper, Metal HVAC Ducting Insert Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fan | Harfington, 1
    harfington
    $8.77
    Backdraft Damper, Metal HVAC Ducting Insert Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fan | Harfington, 1
    harfington
    $508.95
    Resideo TK60PV150PNKP TK60 Boiler Trim Kit W/ 1-1/2" IPS Air Eliminator & Double-Check Backflow Preventer, TK60PV150PNKP | Supplyhouse.Com
    SupplyHouse.com
    $508.95
    Resideo TK60PV150PNKP TK60 Boiler Trim Kit W/ 1-1/2" IPS Air Eliminator & Double-Check Backflow Preventer, TK60PV150PNKP | Supplyhouse.Com
    SupplyHouse.com
    $19.01
    6"" Metal Backdraft Damper Backflow Preventer Draft Blocker Duct Connector
    eBay.com
    Free shipping
    $19.01
    6"" Metal Backdraft Damper Backflow Preventer Draft Blocker Duct Connector
    eBay.com
    $39.46
    5 Inch Duct Manual Volume Backdraft Damper,Vent Damper Control Valve,For HVAC
    eBay.com
    11
    Free shipping
    $39.46
    5 Inch Duct Manual Volume Backdraft Damper,Vent Damper Control Valve,For HVAC
    eBay.com
    $35.81
    Volume Backdraft 4 Inch Airflow Ducting Branch Vent Damper Air Control Valve
    eBay.com
    Free shipping
    $35.81
    Volume Backdraft 4 Inch Airflow Ducting Branch Vent Damper Air Control Valve
    eBay.com
    $2.25
    DIG - 3/4' Backflow Preventer, Black (FHT X MHT) - 18-001
    Cheap Sprinklers
    $2.25
    DIG - 3/4' Backflow Preventer, Black (FHT X MHT) - 18-001
    Cheap Sprinklers
    $234.71
    Taco TTK-125T-SEL 1-1/4" Select Near Boiler Trim Kit ,Air Separator, Comb Boiler Feed Valve & Backflow Preventer, 4-1/2 Gal Exp
    SupplyHouse.com
    2
    $234.71
    Taco TTK-125T-SEL 1-1/4" Select Near Boiler Trim Kit ,Air Separator, Comb Boiler Feed Valve & Backflow Preventer, 4-1/2 Gal Exp
    SupplyHouse.com
    $4,512.99
    Zurn 3" 375A Reduced Pressure Principle Backflow Preventer 3-375A
    Core & Main
    $4,512.99
    Zurn 3" 375A Reduced Pressure Principle Backflow Preventer 3-375A
    Core & Main
    $22.99
    Uxcell 6" Backdraft Damper Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamp Silver 1 Set
    Walmart
    Free shipping
    $22.99
    Uxcell 6" Backdraft Damper Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamp Silver 1 Set
    Walmart
    $364.87
    Groen 146392 Backflow Preventer - Watts - Actuators
    Parts Town
    $364.87
    Groen 146392 Backflow Preventer - Watts - Actuators
    Parts Town
    $2,776.61
    Gaylord 22498 OEM 1in Backflow Preventer
    WebstaurantStore
    $2,776.61
    Gaylord 22498 OEM 1in Backflow Preventer
    WebstaurantStore
    $141.48
    Lafferty Backflow Preventer, 9DM2, 3/4"
    Worldwide Janitor
    $141.48
    Lafferty Backflow Preventer, 9DM2, 3/4"
    Worldwide Janitor

    • backflow preventers | Products At Affordable Prices