Featured Categories

  • Tools & Machining
  • Shipping, Packaging & Office Supplies
  • Plumbing
  • Safety

Shop Categories

  • Abrasives & Polishers
  • Adhesives & Tapes
  • Electrical Supplies
  • Electronics
  • Fasteners
  • Food Service & Restaurant Supplies
  • Furniture, Linens & Decor
  • Grounds & Outdoor
  • Hardware & Building Materials
  • Heating & Cooling
  • Janitorial & Cleaning Supplies
  • Lab Equipment & Supplies
  • Lighting
  • Material Handling
  • Medical & Personal Care
  • Paint, Coatings & Supplies
  • Plumbing
  • Power Transmission
  • Pumps
  • Raw Materials
  • Safety
  • Shipping, Packaging & Office Supplies
  • Storage & Workspace
  • Test Instruments & Gauges
  • Tools & Machining
  • Vehicle Maintenance
  • Welding, Soldering & Brazing
  • About Us
  • Deals
  • Contact Us
Added to Cart
Skip to Main Content Accessibility Statement
FREE SHIPPING on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
User Headset Icon User Headset Icon Customer Service
Cart Icon
0
Cart Icon
0
Cart
  • Low prices on everyday needs. Shop Zoro Select
  • Don't miss these limited time offers. Shop All Deals
  • Get 30 days to pay with Net 30. Apply Now
  1. Home
  2. /
  3. Plumbing
  4. /
  5. Pipes, Valves & Fittings
  6. /
  7. Valves
  8. /
  9. Backflow Preventers

Backflow Preventers (622 items) - Page 9

Watts Backflow Preventer, Size 1/2", 150 psi 1/2 LF800M4-QT
Watts

Backflow Preventer, Size 1/2", 150 psi

Zoro # G505303757
Mfr # 1/2 LF800M4-QT
product price:  $532.99
/ea
Wilkins Backflow Preventer, 1/2 in, FNPT 12-975XL3
Wilkins

Backflow Preventer, 1/2 in, FNPT

Zoro # G008230062
Mfr # 12-975XL3
product price:  $910.99
/ea
Watts Backflow Preventer, High Investment Level 3/4 LF919-QT-S-FS
Watts

Backflow Preventer, High Investment Level

Zoro # G710090442
Mfr # 3/4 LF919-QT-S-FS
product price:  $1,471.99
/ea
Wilkins Backflow Preventer, 3/4 in, FNPT 34-975XL2SAG
Wilkins

Backflow Preventer, 3/4 in, FNPT

Zoro # G508230012
Mfr # 34-975XL2SAG
product price:  $1,343.99
/ea
Wilkins Backflow Preventer, 3/4 in. Size, Bronze 34-375XLB
Wilkins

Backflow Preventer, 3/4 in. Size, Bronze

Zoro # G2373485
Mfr # 34-375XLB
product price:  $931.99
/ea
Spears Backwater Valve, 6 In., PVC, 120 Deg F S675P
Spears

Backwater Valve, 6 In., PVC, 120 Deg F

Zoro # G5065541
Mfr # S675P
product price:  $614.29
/ea
Wilkins Backflow Preventer, 1 1/4 in, FNPT 114-975XL3
Wilkins

Backflow Preventer, 1 1/4 in, FNPT

Zoro # G608230073
Mfr # 114-975XL3
product price:  $1,713.99
/ea
Watts Dual Check with Vent, Watt9BD, 3/8in, Flare 9BD
Watts

Dual Check with Vent, Watt9BD, 3/8in, Flare

Zoro # G1686721
Mfr # 9BD
product price:  $637.65
/ea
Watts Check Valve, 2.125 in Overall L LF601 1/2
Watts

Check Valve, 2.125 in Overall L

Zoro # G205303705
Mfr # LF601 1/2
product price:  $186.99
/ea
Watts Double Check Valve Assembly, 25 3/4" L 3/4 LF007M3-QT-S-FZ
Watts

Double Check Valve Assembly, 25 3/4" L

Zoro # G510854510
Mfr # 3/4 LF007M3-QT-S-FZ
product price:  $648.92
/ea
Watts Reduced Pressure Zone, 994, 6in, Flanged 994-NRS
Watts

Reduced Pressure Zone, 994, 6in, Flanged

Zoro # G2198939
Mfr # 994-NRS
product price:  $12,543.99
/ea
Watts Double Check Valve Assembly, Watts 757 757 OSY 8
Watts

Double Check Valve Assembly, Watts 757

Zoro # G2432001
Mfr # 757 OSY 8
product price:  $15,325.99
/ea
Watts Double Check Detector, 774, 8in, Flanged 774DCDA-OSY-GPM
Watts

Double Check Detector, 774, 8in, Flanged

Zoro # G2198990
Mfr # 774DCDA-OSY-GPM
product price:  $15,031.99
/ea
Watts Backflow Preventer, Size 1 1/4", 125 psi 1 1/4 188A
Watts

Backflow Preventer, Size 1 1/4", 125 psi

Zoro # G205303712
Mfr # 1 1/4 188A
product price:  $378.99
/ea
Watts DoubleCheckValve, W774, 2-1/2in, NRSShutoff 774-NRS
Watts

DoubleCheckValve, W774, 2-1/2in, NRSShutoff

Zoro # G2199395
Mfr # 774-NRS
product price:  $3,969.99
/ea
Watts DoubleCheckDetector, 4in, Flanged 709DCDA-OSY-GPM
Watts

DoubleCheckDetector, 4in, Flanged

Zoro # G2199115
Mfr # 709DCDA-OSY-GPM
product price:  $18,937.99
/ea
Watts Double Check Valve, Watts774, 4in, Flanged 774-NRS
Watts

Double Check Valve, Watts774, 4in, Flanged

Zoro # G2199377
Mfr # 774-NRS
product price:  $6,066.99
/ea
Watts Backflow Preventer, Size 2", 125 psi 2 188A
Watts

Backflow Preventer, Size 2", 125 psi

Zoro # G705303588
Mfr # 2 188A
product price:  $1,020.99
/ea
Watts Double Check Valve, Watts774, 6in, 21-1/2 774-NRS
Watts

Double Check Valve, Watts774, 6in, 21-1/2

Zoro # G2199368
Mfr # 774-NRS
product price:  $8,932.99
/ea
Watts Backflow Preventer, Size 2 1/2", 125 psi 2 1/2 LF288AM2
Watts

Backflow Preventer, Size 2 1/2", 125 psi

Zoro # G505303733
Mfr # 2 1/2 LF288AM2
product price:  $3,086.99
/ea
Watts Double Check Detector, 774, 3in, 18-7/8inH 774DCDA-OSY-GPM
Watts

Double Check Detector, 774, 3in, 18-7/8inH

Zoro # G2199027
Mfr # 774DCDA-OSY-GPM
product price:  $7,181.99
/ea
Watts Double Check Valve, Watts774, 6in, 35-5/8 774-OSY
Watts

Double Check Valve, Watts774, 6in, 35-5/8

Zoro # G2199298
Mfr # 774-OSY
product price:  $9,924.99
/ea
Watts Backflow Preventer, Size 1 1/2", 150 psi 1 1/2 LF800M4-QT
Watts

Backflow Preventer, Size 1 1/2", 150 psi

Zoro # G705303700
Mfr # 1 1/2 LF800M4-QT
product price:  $1,644.99
/ea
Watts Double Check Detector, 774, 6in, ShortLayL 774DCDA-OSY-GPM
Watts

Double Check Detector, 774, 6in, ShortLayL

Zoro # G2199009
Mfr # 774DCDA-OSY-GPM
product price:  $9,702.99
/ea
Sioux Chief 869 Series ProCheck 4 Inch ABS and PVC Solvent Weld Backwater Valve 869-S4PS
Sioux Chief

869 Series ProCheck 4 Inch ABS and PVC Solvent Weld Backwater Valve

Zoro # G221718507
Mfr # 869-S4PS
product price:  $82.99
/ea
Watts Double Check Detector, 774, 3in, Flanged 774DCDA-OSY-CFM
Watts

Double Check Detector, 774, 3in, Flanged

Zoro # G2199097
Mfr # 774DCDA-OSY-CFM
product price:  $4,981.99
/ea
Watts DoubleCheckDetector, 007, 3in, Flanged 007DCDAOSY-GPM
Watts

DoubleCheckDetector, 007, 3in, Flanged

Zoro # G2199219
Mfr # 007DCDAOSY-GPM
product price:  $7,695.99
/ea
Watts Backflow Preventer, Size 3/4", 125 psi 3/4 188A
Watts

Backflow Preventer, Size 3/4", 125 psi

Zoro # G405303697
Mfr # 3/4 188A
product price:  $204.99
/ea
Watts DoubleCheckValve, W774, 2-1/2in, OSYShutoff 774-OSY
Watts

DoubleCheckValve, W774, 2-1/2in, OSYShutoff

Zoro # G2199325
Mfr # 774-OSY
product price:  $3,634.99
/ea
Watts DoubleCheckDetector, 709DCDA, 3in, Flanged 709DCDA-OSY-CFM
Watts

DoubleCheckDetector, 709DCDA, 3in, Flanged

Zoro # G2199200
Mfr # 709DCDA-OSY-CFM
product price:  $7,297.99
/ea
Watts Double Check Valve, Watts774, 8in, 44-1/2 774-OSY
Watts

Double Check Valve, Watts774, 8in, 44-1/2

Zoro # G2199289
Mfr # 774-OSY
product price:  $10,539.99
/ea
Watts Double Check Detector, 774, 12in, Flanged 774DCDA-OSY-CFM
Watts

Double Check Detector, 774, 12in, Flanged

Zoro # G2199045
Mfr # 774DCDA-OSY-CFM
product price:  $26,592.99
/ea
Wilkins Wxtp-75V - Thermal Expansion Tank WXTP-75V
Wilkins

Wxtp-75V - Thermal Expansion Tank

Zoro # G7736904
Mfr # WXTP-75V
product price:  $1,197.99
/ea
Wilkins Reduced Pressure Principle Backflow Prev 4-375
Wilkins

Reduced Pressure Principle Backflow Prev

Zoro # G7507709
Mfr # 4-375
product price:  $6,721.99
/ea
Wilkins Xt-35 - Thermal Expansion Tank XT-35
Wilkins

Xt-35 - Thermal Expansion Tank

Zoro # G7737342
Mfr # XT-35
product price:  $524.99
/ea
Sioux Chief 869-S4PPK ABS Backwater Valve 4 in. 4366738
Sioux Chief

869-S4PPK ABS Backwater Valve 4 in.

Zoro # G704031512
Mfr # 4366738
product price:  $69.05
/ea
Backflow Preventers (622 items) - Page 9
  • First
  • Previous
  • 9
    of 18 pages
  • Next
  • Last
How was your search?

About Backflow Preventers

Backflow preventers are essential plumbing devices used to protect potable water systems from contamination and pollution caused by backflow of non-potable water or other substances. The backflow preventer ensures that the water flows in only one direction, preventing any backflow of water from the plumbing system back into the water supply.

Types of Backflow Preventers

There are various types of backflow preventers available in the market, including reduced pressure zone (RPZ), double check valve (DC), and pressure vacuum breaker (PVB). Each type of backflow preventer has its unique features, making them suitable for different applications. The selection of the type of backflow preventer depends on various factors such as pipe size, connection type, body material, series, maximum pressure, and temperature range.

How Backflow Preventers are Made

Backflow preventers are made of various materials such as brass, stainless steel, and plastic. The body of the backflow preventer is designed to provide a reliable, long-lasting, and leak-proof seal. The internal components, such as the check valves and relief valves, are made of rubber, neoprene, or similar materials to ensure they function correctly. Backflow preventers are manufactured using advanced technologies and tested to ensure they meet the required performance standards.

Industries that use Backflow Preventers

Backflow preventers are widely used in various industries, including residential, commercial, industrial, and institutional applications. Plumbing contractors, engineers, and building maintenance personnel frequently use backflow preventers to ensure the safety and integrity of the water supply. Some of the industries that commonly use backflow preventers include water treatment plants, food and beverage processing plants, hospitals, and laboratories.

Find the Backflow Preventers You Need at Zoro

Looking for a specific item? Use our robust search tool to find it by name or keyword, or use our handy filters to narrow down our full assortment. You can also check out our whole selection of plumbing tools & supplies, along with other equipment and essentials to ensure you have all you need to tackle the job, especially if you're taking on a DIY project for the first time.
Plus, when you shop at Zoro, you'll always enjoy competitive prices on tons of great brands you know and trust. We make the shopping experience as fast and seamless as possible with free shipping on orders over $50 for registered users, Net 30 payment terms for qualifying customers, and an unparalleled customer service experience.

Related Categories

Ball ValvesCheck ValvesPressure Reducing ValvesBackflow Preventer Repair KitsPVC Pipe Fittings
Camlock FittingsPress-Fit Tube FittingsCopper FittingsPipe & Tube ClampsBlack Pipe Fittings
watts series 009 3/4backflow check175 psi pressure switchhose connection vacuum breakerdouble check
watts back-flow preventer4 in no hub6" threaded pipe capbackflow preventersizebackflow check preventer

Sign up and save

Take 10% off your next order when you sign up for Zoro emails. Subscribe now to receive your promo code via email.

Follow us

  • Facebook
  • YouTube
  • LinkedIn
  • Instagram
Every part plays a part

Information

  • About Us
  • Accessibility
  • Careers
  • Inclusion
  • Giving Back
  • Resource Hub
  • Returns
  • Shipping

Shopping

  • Brands
  • Collections
  • My Account
  • Payments
  • Deals
  • Sitemap
  • Track My Order

Services

  • Customer Service
  • FAQs
  • Net 30 Terms
  • Reseller Program
  • Sell on Zoro
  • Participate in Research
  • Tax Exemption

Zoro, Inc

Connect

Customer service from real people

  • Phone: (855) 289-9676
  • Contact Us

© 2011-2026 Zoro Tools, Inc. All rights reserved.
  • Terms & Conditions
  • Terms of Access
  • Privacy Policy
Zoro, Inc