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$219.85
Watts LF007 Series 3/4" Lead-Free Copper Silicon Alloy Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Single Top Entry, NPT
Amazon.com
1
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$219.85
Watts LF007 Series 3/4" Lead-Free Copper Silicon Alloy Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Single Top Entry, NPT
Amazon.com
1
$221.20
Zurn Wilkins 1-350 1" 350 Double Check Backflow Preventer
Amazon.com
68
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$221.20
Zurn Wilkins 1-350 1" 350 Double Check Backflow Preventer
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$421.99
Zurn Wilkins 1-350XL 1" 350XL Double Check Backflow Preventer
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127
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Zurn Wilkins 1-350XL 1" 350XL Double Check Backflow Preventer
Amazon.com
127
$402.69
Apollo Double Check Valve Backflow Assembly 1": 4A, 1 in Pipe Size, FNPT X FNPT, 14.63 in Overall Lg Model: 4A105A2F
Grainger
$402.69
Apollo Double Check Valve Backflow Assembly 1": 4A, 1 in Pipe Size, FNPT X FNPT, 14.63 in Overall Lg Model: 4A105A2F
Grainger
$215.07
Zurn Wilkins 3/4" 350 Double Check Backflow Preventer With SAE Flare Test Fitting
Amazon.com
27
Free shipping
$215.07
Zurn Wilkins 3/4" 350 Double Check Backflow Preventer With SAE Flare Test Fitting
Amazon.com
27
$19,275.85
Wilkins Double Check Backflow Preventer: 350AST, 8 in Pipe Size, Flange X Flange, 52.75 in Overall Lg Model: 8-350AST
Grainger
$19,275.85
Wilkins Double Check Backflow Preventer: 350AST, 8 in Pipe Size, Flange X Flange, 52.75 in Overall Lg Model: 8-350AST
Grainger
$279.55
Febco LF850 Series 1" Lead-Free Bronze Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Small Diameter, NPT Connections,
Amazon.com
1
Free shipping
$279.55
Febco LF850 Series 1" Lead-Free Bronze Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Small Diameter, NPT Connections,
Amazon.com
1
$6,562.57
Wilkins Double Check Backflow Preventer: 350, 4 in Pipe Size, Flange X Flange, 37.63 in Overall Lg, 350 Model: 4-350
Grainger
$6,562.57
Wilkins Double Check Backflow Preventer: 350, 4 in Pipe Size, Flange X Flange, 37.63 in Overall Lg, 350 Model: 4-350
Grainger
$4,784.87
Wilkins Double Check Backflow Preventer: 350, 3 in Pipe Size, Flange X Flange, 32 in Overall Lg, EPDM Model: 3-350
Grainger
$4,784.87
Wilkins Double Check Backflow Preventer: 350, 3 in Pipe Size, Flange X Flange, 32 in Overall Lg, EPDM Model: 3-350
Grainger
$109.80
Watts 9D Series 3/4" Brass Dual Check Valve Backflow Preventer, Union Female NPT Inlet X Female NPT Outlet, Intermediate Atmospheric Vent, Compact
Amazon.com
97
Free shipping
$109.80
Watts 9D Series 3/4" Brass Dual Check Valve Backflow Preventer, Union Female NPT Inlet X Female NPT Outlet, Intermediate Atmospheric Vent, Compact
Amazon.com
97
$4,858.67
Wilkins Double Check Backflow Preventer: 350A, 3 in Pipe Size, Groove X Groove, 36.13 in Overall Lg Model: 3-350A
Grainger
$4,858.67
Wilkins Double Check Backflow Preventer: 350A, 3 in Pipe Size, Groove X Groove, 36.13 in Overall Lg Model: 3-350A
Grainger
$39.99
1/2" 9D-M3 Backflow Preventer Brass Dual Check Valve With Intermediate Atmospheric Vent,1/2 Inch,Female Union Inlet And Outlet,190T012,Replacement
Amazon.com
Free shipping
$39.99
1/2" 9D-M3 Backflow Preventer Brass Dual Check Valve With Intermediate Atmospheric Vent,1/2 Inch,Female Union Inlet And Outlet,190T012,Replacement
Amazon.com
Free shipping
$331.99
3/4 in. 950XL Double Check Backflow Preventer Valve
Home Depot
1
Free shipping
$331.99
3/4 in. 950XL Double Check Backflow Preventer Valve
Home Depot
1
$458.84
1 in. 950XLT2 Double Check Backflow Preventer Valve
Home Depot
10
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$458.84
1 in. 950XLT2 Double Check Backflow Preventer Valve
Home Depot
10
$318.19
3/4 in. Bronze Double Check Valve Backflow Preventer Assembly Quarter Turn Shutoff With Freeze Sensor
Home Depot
Free shipping
$318.19
3/4 in. Bronze Double Check Valve Backflow Preventer Assembly Quarter Turn Shutoff With Freeze Sensor
Home Depot
Free shipping
$421.99
1 in. 950XL3 Double Check Backflow Preventer
Home Depot
1
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$421.99
1 in. 950XL3 Double Check Backflow Preventer
Home Depot
1
$723.99
1 in. 950XL3 Double Check Backflow Preventer With Union Ball Valves
Home Depot
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1 in. 950XL3 Double Check Backflow Preventer With Union Ball Valves
Home Depot
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$421.99
Zurn 1-950XL3 1" Wilkins 950XL3 Double Check Backflow Preventer | Supplyhouse.Com
SupplyHouse.com
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Zurn 1-950XL3 1" Wilkins 950XL3 Double Check Backflow Preventer | Supplyhouse.Com
SupplyHouse.com
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$404.99
Zurn Wilkins 350 1" Double Check Backflow Preventer, 175 PSI, 1-350
Global Industrial
68
$404.99
Zurn Wilkins 350 1" Double Check Backflow Preventer, 175 PSI, 1-350
Global Industrial
68
$765.99
1-1/4 in. Dia Bronze Double Check Backflow Preventer
Home Depot
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1-1/4 in. Dia Bronze Double Check Backflow Preventer
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$519.99
3/4 in. 950XL3 Double Check Backflow Preventer
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3/4 in. 950XL3 Double Check Backflow Preventer
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$1,110.99
1-1/4 in. Dia Bronze Double Check Backflow Preventer
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1-1/4 in. Dia Bronze Double Check Backflow Preventer
Home Depot
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$493.49
3/4 in. 950XL3 Double Check Backflow Preventer With Union Ball Valves
Home Depot
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3/4 in. 950XL3 Double Check Backflow Preventer With Union Ball Valves
Home Depot
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$228.75
Febco 1113 850-QT Double Check Valve Bronze Body Quarter Turn Shutoff, 1"
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9
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$228.75
Febco 1113 850-QT Double Check Valve Bronze Body Quarter Turn Shutoff, 1"
Amazon.com
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$1,022.99
1-1/4 in. Dia Bronze Double Check Backflow Preventer
Home Depot
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1-1/4 in. Dia Bronze Double Check Backflow Preventer
Home Depot
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1-1/2 in. 950XL3 Double Check Backflow Preventer
Home Depot
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1-1/2 in. 950XL3 Double Check Backflow Preventer
Home Depot
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$499.43
Watts 0061673 3/8" FNPT SD3-FN-LS Dual Check Valve Backflow Preventer, Atmospheric Vent (Lead Free) | Supplyhouse.Com
SupplyHouse.com
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Watts 0061673 3/8" FNPT SD3-FN-LS Dual Check Valve Backflow Preventer, Atmospheric Vent (Lead Free) | Supplyhouse.Com
SupplyHouse.com
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1 in. 350XL Double Check Backflow Preventer Valve
Home Depot
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1 in. 350XL Double Check Backflow Preventer Valve
Home Depot
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2 in. 950XL3 Double Check Backflow Preventer
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2 in. 950XL3 Double Check Backflow Preventer
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Flamco BFPNL-050F Dual Check Backflow Preventer 1/2" FNPT | Supplyhouse.Com
SupplyHouse.com
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Flamco BFPNL-050F Dual Check Backflow Preventer 1/2" FNPT | Supplyhouse.Com
SupplyHouse.com
$859.09
1-1/2 in. 350 Double Check Backflow Preventer, Non-Potable
Home Depot
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$859.09
1-1/2 in. 350 Double Check Backflow Preventer, Non-Potable
Home Depot
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$5,940.84
3/4 in. Bronze Double Check Valve Backflow Preventer
Home Depot
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3/4 in. Bronze Double Check Valve Backflow Preventer
Home Depot
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$205.83
Febco 1112 850-QT Double Check Valve Bronze Body Quarter Turn Shutoff, 3/4"
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Febco 1112 850-QT Double Check Valve Bronze Body Quarter Turn Shutoff, 3/4"
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1-1/2 in. Double Check Backflow Preventer
Home Depot
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1-1/2 in. Double Check Backflow Preventer
Home Depot
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$389.13
Watts 0061667 3/8" SD3-FN Dual Check Valve Backflow Preventer With Atmospheric Vent And Wye Strainer (FNPT) | Supplyhouse.Com
SupplyHouse.com
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Watts 0061667 3/8" SD3-FN Dual Check Valve Backflow Preventer With Atmospheric Vent And Wye Strainer (FNPT) | Supplyhouse.Com
SupplyHouse.com
$465.76
Watts 1 in. D X 1 in. D FNPT X FNPT Brass Backflow Preventer Double Check Valve
Ace Hardware
$465.76
Watts 1 in. D X 1 in. D FNPT X FNPT Brass Backflow Preventer Double Check Valve
Ace Hardware
Double Check Valve Assembly - How It Works
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Shop double check backflow

Sponsored
About our ads
$219.85
Watts LF007 Series 3/4" Lead-Free Copper Silicon Alloy Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Single Top Entry, NPT
Amazon.com
1
Free shipping
$219.85
Watts LF007 Series 3/4" Lead-Free Copper Silicon Alloy Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Single Top Entry, NPT
Amazon.com
1
$221.20
Zurn Wilkins 1-350 1" 350 Double Check Backflow Preventer
Amazon.com
68
Free shipping
$221.20
Zurn Wilkins 1-350 1" 350 Double Check Backflow Preventer
Amazon.com
68
$421.99
Zurn Wilkins 1-350XL 1" 350XL Double Check Backflow Preventer
Amazon.com
127
Free shipping
$421.99
Zurn Wilkins 1-350XL 1" 350XL Double Check Backflow Preventer
Amazon.com
127
$402.69
Apollo Double Check Valve Backflow Assembly 1": 4A, 1 in Pipe Size, FNPT X FNPT, 14.63 in Overall Lg Model: 4A105A2F
Grainger
$402.69
Apollo Double Check Valve Backflow Assembly 1": 4A, 1 in Pipe Size, FNPT X FNPT, 14.63 in Overall Lg Model: 4A105A2F
Grainger
$215.07
Zurn Wilkins 3/4" 350 Double Check Backflow Preventer With SAE Flare Test Fitting
Amazon.com
27
Free shipping
$215.07
Zurn Wilkins 3/4" 350 Double Check Backflow Preventer With SAE Flare Test Fitting
Amazon.com
27
$19,275.85
Wilkins Double Check Backflow Preventer: 350AST, 8 in Pipe Size, Flange X Flange, 52.75 in Overall Lg Model: 8-350AST
Grainger
$19,275.85
Wilkins Double Check Backflow Preventer: 350AST, 8 in Pipe Size, Flange X Flange, 52.75 in Overall Lg Model: 8-350AST
Grainger
$279.55
Febco LF850 Series 1" Lead-Free Bronze Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Small Diameter, NPT Connections,
Amazon.com
1
Free shipping
$279.55
Febco LF850 Series 1" Lead-Free Bronze Double Check Valve Backflow Preventer Assembly, Quarter Turn Shutoff, Small Diameter, NPT Connections,
Amazon.com
1
$6,562.57
Wilkins Double Check Backflow Preventer: 350, 4 in Pipe Size, Flange X Flange, 37.63 in Overall Lg, 350 Model: 4-350
Grainger
$6,562.57
Wilkins Double Check Backflow Preventer: 350, 4 in Pipe Size, Flange X Flange, 37.63 in Overall Lg, 350 Model: 4-350
Grainger
$4,784.87
Wilkins Double Check Backflow Preventer: 350, 3 in Pipe Size, Flange X Flange, 32 in Overall Lg, EPDM Model: 3-350
Grainger
$4,784.87
Wilkins Double Check Backflow Preventer: 350, 3 in Pipe Size, Flange X Flange, 32 in Overall Lg, EPDM Model: 3-350
Grainger
$109.80
Watts 9D Series 3/4" Brass Dual Check Valve Backflow Preventer, Union Female NPT Inlet X Female NPT Outlet, Intermediate Atmospheric Vent, Compact
Amazon.com
97
Free shipping
$109.80
Watts 9D Series 3/4" Brass Dual Check Valve Backflow Preventer, Union Female NPT Inlet X Female NPT Outlet, Intermediate Atmospheric Vent, Compact
Amazon.com
97
$4,858.67
Wilkins Double Check Backflow Preventer: 350A, 3 in Pipe Size, Groove X Groove, 36.13 in Overall Lg Model: 3-350A
Grainger
$4,858.67
Wilkins Double Check Backflow Preventer: 350A, 3 in Pipe Size, Groove X Groove, 36.13 in Overall Lg Model: 3-350A
Grainger
$39.99
1/2" 9D-M3 Backflow Preventer Brass Dual Check Valve With Intermediate Atmospheric Vent,1/2 Inch,Female Union Inlet And Outlet,190T012,Replacement
Amazon.com
Free shipping
$39.99
1/2" 9D-M3 Backflow Preventer Brass Dual Check Valve With Intermediate Atmospheric Vent,1/2 Inch,Female Union Inlet And Outlet,190T012,Replacement
Amazon.com
Free shipping
$331.99
3/4 in. 950XL Double Check Backflow Preventer Valve
Home Depot
1
Free shipping
$331.99
3/4 in. 950XL Double Check Backflow Preventer Valve
Home Depot
1
$458.84
1 in. 950XLT2 Double Check Backflow Preventer Valve
Home Depot
10
Free shipping
$458.84
1 in. 950XLT2 Double Check Backflow Preventer Valve
Home Depot
10
$318.19
3/4 in. Bronze Double Check Valve Backflow Preventer Assembly Quarter Turn Shutoff With Freeze Sensor
Home Depot
Free shipping
$318.19
3/4 in. Bronze Double Check Valve Backflow Preventer Assembly Quarter Turn Shutoff With Freeze Sensor
Home Depot
Free shipping
$421.99
1 in. 950XL3 Double Check Backflow Preventer
Home Depot
1
Free shipping
$421.99
1 in. 950XL3 Double Check Backflow Preventer
Home Depot
1
$723.99
1 in. 950XL3 Double Check Backflow Preventer With Union Ball Valves
Home Depot
Free shipping
$723.99
1 in. 950XL3 Double Check Backflow Preventer With Union Ball Valves
Home Depot
Free shipping
$421.99
Zurn 1-950XL3 1" Wilkins 950XL3 Double Check Backflow Preventer | Supplyhouse.Com
SupplyHouse.com
1
$421.99
Zurn 1-950XL3 1" Wilkins 950XL3 Double Check Backflow Preventer | Supplyhouse.Com
SupplyHouse.com
1