Double Check Detector Assembly Backflow Preventers

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FNW® Adjustable Pipe Stands

Get high-quality support for pipe, valves and backflow preventers.

Popular Backflow Preventer Brands

Popular Backflow Preventer Types

Reduced Pressure Zone Assembly Reduced Pressure Zone Assembly
Reduced Pressure Detector Assembly Reduced Pressure Detector Assembly
Double Check Detector Assembly Double Check Detector Assembly
Double Check Valve Assembly Double Check Valve Assembly

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93 Products
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8 in. Ductile Iron Flanged 350 psi Backflow Preventer
Zurn Wilkins Model 350ASTDA

8 in. Ductile Iron Flanged 350 psi Backflow Preventer
Part #W350ASTDAX
Item #4719911
Mfr. Part #8-350ASTDA
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Lead Law Compliant

8 in. 304 Stainless Steel Flanged 175 psi Backflow Preventer
Watts Series LF757DCDA

8 in. 304 Stainless Steel Flanged 175 psi Backflow Preventer
Part #WLF757DCDAOSYGPMX
Item #4525229
Mfr. Part #0122718
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

8 in. Stainless Steel Flanged 175 psi Backflow Preventer
Watts Series 774DCDA

8 in. Stainless Steel Flanged 175 psi Backflow Preventer
Part #W774DCDAOSYGPMX
Item #673240
Mfr. Part #0438029
4.1 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Not Compliant, Approved for Non-Potable Water Applications

4 in. Stainless Steel Grooved Backflow Preventer
Ames Fire & Waterworks Deringer 30/30G

4 in. Stainless Steel Grooved Backflow Preventer
Part #AD4030GPM
Item #8455353
Mfr. Part #D-4030-GPM
4 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
Out of Stock
  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification
6 in. Ductile Iron Flanged 350 psi Backflow Preventer
Zurn Wilkins Model 350ASTDA

6 in. Ductile Iron Flanged 350 psi Backflow Preventer
Part #W350ASTDALFU
Item #4802176
Mfr. Part #6-350ASTDA
4.5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

6 in. Stainless Steel Flanged 175 psi Backflow Preventer
Watts Series 757DCDA

6 in. Stainless Steel Flanged 175 psi Backflow Preventer
Part #W757DCDAOSYGPMU
Item #2148181
Mfr. Part #0111553
4.2 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Not Compliant, Approved for Non-Potable Water Applications

6 in. Stainless Steel Grooved Backflow Preventer
Ames Fire & Waterworks Deringer 30/30G

6 in. Stainless Steel Grooved Backflow Preventer
Part #AD6030GPM
Item #8693535
Mfr. Part #D-6030-GPM
3.6 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
Out of Stock
  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification
1 -1/2 in. Brass FPT Dual Check Valve
Watts Series LF07S

1 -1/2 in. Brass FPT Dual Check Valve
Part #WLF07SJ
Item #5051210
Mfr. Part #0061943
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
Out of Stock
  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Lead Law Compliant, Not Certified

2 in. Cast Bronze Flanged 350 psi Double Check Valve Backflow Preventer
Zurn Wilkins Model 350XL

2 in. Cast Bronze Flanged 350 psi Double Check Valve Backflow Preventer
Part #W350XLK
Item #3908894
Mfr. Part #2-350XL
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
  • Pick Up: Not available
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

4 in. Stainless Steel Flanged Backflow Preventer
Ames Fire & Waterworks Series 3000SS

4 in. Stainless Steel Flanged Backflow Preventer
Part #A3000SSOSYTSGPMP
Item #9788222
Mfr. Part #88003094
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification
3/8 in. Stainless Steel MPT Dual Check Valve with Atmospheric Vent and Strainer
Watts Model 350ASTDA

3/8 in. Stainless Steel MPT Dual Check Valve with Atmospheric Vent and Strainer
Part #WSD3MFC
Item #1222720
Mfr. Part #0061657
4.3 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
  • Pick Up: 2 in Leesburg, VA
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

3/4 in. Cast Copper Silicon Alloy FPT Double Check Valve Assembly
Watts Series LF007

3/4 in. Cast Copper Silicon Alloy FPT Double Check Valve Assembly
Part #WLF007M3QTF
Item #2980570
Mfr. Part #0063231
4.8 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
  • Pick Up: 0 in Leesburg, VA Available Nearby
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

8 in. Stainless Steel Flanged 175 psi Backflow Preventer
Ames Fire & Waterworks Series 2000SS

8 in. Stainless Steel Flanged 175 psi Backflow Preventer
Part #A2000SSOSYTSX
Item #9788224
Mfr. Part #88003085
4.7 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification
8 in. 304 Stainless Steel Flanged 175 psi Backflow Preventer
Ames Fire & Waterworks LFC300

8 in. 304 Stainless Steel Flanged 175 psi Backflow Preventer
Part #ALFC300OSYGPMX
Item #4529785
Mfr. Part #0124567
4.7 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

6 in. Ductile Iron Flanged 350 psi Backflow Preventer
Zurn Wilkins Model 350A

6 in. Ductile Iron Flanged 350 psi Backflow Preventer
Part #W350AOSYU
Item #2149567
Mfr. Part #6-350AOSY
4.1 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

6 in. Ductile Iron Flanged 350 psi Backflow Preventer
FEBCO LF876V

6 in. Ductile Iron Flanged 350 psi Backflow Preventer
Part #FLF876VDOSYGPMU
Item #7757009
Mfr. Part #0124483
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Lead Law Compliant

1-1/2 in. Cast Copper Silicon Alloy FNPT Backflow Preventer
Watts Series LF719

1-1/2 in. Cast Copper Silicon Alloy FNPT Backflow Preventer
Part #WLF719QTSJ
Item #4525832
Mfr. Part #0065311
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Lead Law Compliant

6 in. 304 Stainless Steel Flanged 175 psi Backflow Preventer
Watts Series LF757DCDA

6 in. 304 Stainless Steel Flanged 175 psi Backflow Preventer
Part #WLF757DCDAOSYCFMU
Item #4525204
Mfr. Part #0122712
4.9 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
Out of Stock
  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Lead Law Compliant

2-1/2 in. Cast Iron FNPT Backflow Preventer
Watts Series LF007

2-1/2 in. Cast Iron FNPT Backflow Preventer
Part #WLF007OSYL
Item #4525900
Mfr. Part #0122633
4.2 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Lead Law Compliant

1-1/4 in. Cast Copper Silicon Alloy FNPT Backflow Preventer
Watts Series LF7

1-1/4 in. Cast Copper Silicon Alloy FNPT Backflow Preventer
Part #WLF7U22H
Item #4583063
Mfr. Part #0792075
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification

  • Lead Law Compliant

4 in. Stainless Steel Flanged Backflow Preventer
Ames Fire & Waterworks Deringer 30/30G

4 in. Stainless Steel Flanged Backflow Preventer
Part #AD4030GGPM
Item #8455361
Mfr. Part #D-4030G-GPM
5 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification
3 in. Stainless Steel Flanged 175 psi Backflow Preventer
Ames Fire & Waterworks Colt™ Series C200

3 in. Stainless Steel Flanged 175 psi Backflow Preventer
Part #AC200OSYTSM
Item #9788238
Mfr. Part #88003103
3.2 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
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  • Pick Up: Not available
  • Shipping: Not available
  • Requires Certification
1 in. Cast Bronze FNPT 175 psi Backflow Preventer
Zurn Wilkins 700XLFP Series

1 in. Cast Bronze FNPT 175 psi Backflow Preventer
Part #W1UFX1F700XLFP
Item #7788075
Mfr. Part #1UFX1F-700XLFP
3.9 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
  • Pick Up: Not available
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

1-1/4 in. Brass FPT x MPT Dual Check Valve
Watts Series LF07S

1-1/4 in. Brass FPT x MPT Dual Check Valve
Part #WLF07SU23HH
Item #4321426
Mfr. Part #0122592
4.9 out of 5 Customer Rating
Requires Certification

Points
$1
EACH
  • Pick Up: Not available
  • Shipping: Available for immediate shipment
  • Requires Certification

  • Lead Law Compliant

Items You May Like
1–6 of 18 items
3/8 in. Cast Copper Silicon Alloy FPT Dual Check Valve
Watts Series LF7

3/8 in. Cast Copper Silicon Alloy FPT Dual Check Valve
Part #WLF7C
Item #3953637
3.3 out of 5 Customer Rating
Requires Certification

Points
$256.88
EACH
1/2 in. Bronze Union FNPT x Union Backflow Preventer
Watts Series 9D

1/2 in. Bronze Union FNPT x Union Backflow Preventer
Part #W9DM3D
Item #35572
4.3 out of 5 Customer Rating
Requires Certification

Points
$120.39
EACH
3/4 in. Cast Bronze Union FNPT x FNPT 175 psi Backflow Preventer
Zurn Wilkins 700XL

3/4 in. Cast Bronze Union FNPT x FNPT 175 psi Backflow Preventer
Part #WUFX34F700XLF
Item #3908843
5 out of 5 Customer Rating
Requires Certification

Points
$74.51
EACH
3/8 in. Stainless Steel FPT Dual Check Valve
Watts Model SD-2

3/8 in. Stainless Steel FPT Dual Check Valve
Part #WSD2FN
Item #2475553
4.8 out of 5 Customer Rating
Requires Certification

Points
$254.63
EACH
3/4 in. x 3/4 in. Brass Union x FPT Dual Check Valve
Watts Series LF7R

3/4 in. x 3/4 in. Brass Union x FPT Dual Check Valve
Part #WLF7RU22F
Item #4378312
4.5 out of 5 Customer Rating
Requires Certification

Points
$105.76
EACH