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
FREE SHIPPING on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
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
Search Feedback

Backflow Preventers (650 items) - Page 11

Wilkins 10in 375 RP SS Body OSY Gates Flng X Flng 10-375ASTOSY
Wilkins

10in 375 RP SS Body OSY Gates Flng X Flng

Zoro # G515797164
Mfr # 10-375ASTOSY
product price:  $34,721.99
/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
Wilkins 6in 475 RP SS Body N Pattern NRS Gates Flng X Flng 6-475ST
Wilkins

6in 475 RP SS Body N Pattern NRS Gates Flng X Flng

Zoro # G015797152
Mfr # 6-475ST
product price:  $15,466.99
/ea
Wilkins 6in 450 DCDA SS Body N Pattern OSY Gates Flng X Flng 6-450STDA
Wilkins

6in 450 DCDA SS Body N Pattern OSY Gates Flng X Flng

Zoro # G515797157
Mfr # 6-450STDA
product price:  $16,695.99
/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 DoubleCheckDetector, 709DCDA, 8in, Flanged 709DCDA-OSY-GPM
Watts

DoubleCheckDetector, 709DCDA, 8in, Flanged

Zoro # G2199121
Mfr # 709DCDA-OSY-GPM
product price:  $23,191.99
/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:  $6,951.99
/ea
Wilkins 4in 450 DCDA Ss Body N Pattern w/Spool Osy Gates Flng X Flng 4-450STDAR
Wilkins

4in 450 DCDA Ss Body N Pattern w/Spool Osy Gates Flng X Flng

Zoro # G515797171
Mfr # 4-450STDAR
product price:  $10,188.99
/ea
Watts Backflow Preventer, Size 1 1/4", 150 psi 1 1/4X1 LF7 10-U2
Watts

Backflow Preventer, Size 1 1/4", 150 psi

Zoro # G105303744
Mfr # 1 1/4X1 LF7 10-U2
product price:  $302.99
/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 Portable Backflow Preventer, Watts 994 994BLT
Watts

Portable Backflow Preventer, Watts 994

Zoro # G2992351
Mfr # 994BLT
product price:  $6,018.99
/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 4in 375 RP W/Wireless Monitor DI Body NRS Gates FLG X FLG 4-375W1
Wilkins

4in 375 RP W/Wireless Monitor DI Body NRS Gates FLG X FLG

Zoro # G215797181
Mfr # 4-375W1
product price:  $7,774.99
/ea
Wilkins 8in 475 RPDA SS Body N Pattern OSY Gates Flng X Flng 8-475STDA
Wilkins

8in 475 RPDA SS Body N Pattern OSY Gates Flng X Flng

Zoro # G715797179
Mfr # 8-475STDA
product price:  $38,701.99
/ea
Watts Backflow Preventer, Size 1 1/2", 125 psi 1 1/2 188A
Watts

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

Zoro # G505303719
Mfr # 1 1/2 188A
product price:  $572.99
/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, 007, 3in, Flanged 007DCDAOSY-GPM
Watts

DoubleCheckDetector, 007, 3in, Flanged

Zoro # G2199219
Mfr # 007DCDAOSY-GPM
product price:  $7,695.99
/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:  $9,451.99
/ea
Wilkins 4in 475 RPDA SS Body N Pattern w/Spool OSY Gates Flng X Flng 4-475STDAR
Wilkins

4in 475 RPDA SS Body N Pattern w/Spool OSY Gates Flng X Flng

Zoro # G715797148
Mfr # 4-475STDAR
product price:  $13,297.99
/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
Wilkins Backflow Preventer, 1-1/4 in. Size, Bronze 114-375XLB
Wilkins

Backflow Preventer, 1-1/4 in. Size, Bronze

Zoro # G2373467
Mfr # 114-375XLB
product price:  $805.99
/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:  $8,506.99
/ea
Watts Backflow Preventer, Size 1/2", 100 psi 1/2 BD911T
Watts

Backflow Preventer, Size 1/2", 100 psi

Zoro # G405303659
Mfr # 1/2 BD911T
product price:  $325.99
/ea
Watts Check Valve, 2 in Overall L LF6 1/4
Watts

Check Valve, 2 in Overall L

Zoro # G805303747
Mfr # LF6 1/4
product price:  $131.99
/ea
Watts Check Valve, 3 in Overall L LF6 1
Watts

Check Valve, 3 in Overall L

Zoro # G005303677
Mfr # LF6 1
product price:  $183.59
/ea
Watts Backflow Preventer, Size 1 1/4", 150 psi 1 1/4 LF800M4-FR
Watts

Backflow Preventer, Size 1 1/4", 150 psi

Zoro # G705303717
Mfr # 1 1/4 LF800M4-FR
product price:  $1,513.99
/ea
Watts DoubleCheck Detector, 774, 8in, ShortLayL 774DCDA-OSY-CFM
Watts

DoubleCheck Detector, 774, 8in, ShortLayL

Zoro # G2199060
Mfr # 774DCDA-OSY-CFM
product price:  $16,804.99
/ea
Wilkins 4in 475 RP SS Body N Pattern w/Spool NRS Gates Flng X Flng 4-475STR
Wilkins

4in 475 RP SS Body N Pattern w/Spool NRS Gates Flng X Flng

Zoro # G115797168
Mfr # 4-475STR
product price:  $10,418.99
/ea
Watts Backflow Preventer, Size 1/2", 100 psi 1/2 BD911S
Watts

Backflow Preventer, Size 1/2", 100 psi

Zoro # G305303650
Mfr # 1/2 BD911S
product price:  $329.99
/ea
Wilkins 2-1/2in 375 RP W/Wireless Monitor, DI Body NRS Gates FLG X FLG 212-375W1
Wilkins

2-1/2in 375 RP W/Wireless Monitor, DI Body NRS Gates FLG X FLG

Zoro # G415797158
Mfr # 212-375W1
product price:  $6,689.99
/ea
Watts Double Check Valve, Watts774, 3in, 14inH 774-NRS
Watts

Double Check Valve, Watts774, 3in, 14inH

Zoro # G2199386
Mfr # 774-NRS
product price:  $4,263.99
/ea
Watts Double Check Detector, 774, 10in, Flanged 774DCDA-OSY-CFM
Watts

Double Check Detector, 774, 10in, Flanged

Zoro # G2199051
Mfr # 774DCDA-OSY-CFM
product price:  $19,661.99
/ea
Wilkins 4in 375 RP W/Wireless Monitor SS Body NRS Gates FLG X FLG 4-375ASTW1
Wilkins

4in 375 RP W/Wireless Monitor SS Body NRS Gates FLG X FLG

Zoro # G215797167
Mfr # 4-375ASTW1
product price:  $7,774.99
/ea
Wilkins 3in 375 RP W/Wireless Monitor SS Body NRS Gates FLG X FLG 3-375ASTW1
Wilkins

3in 375 RP W/Wireless Monitor SS Body NRS Gates FLG X FLG

Zoro # G815797178
Mfr # 3-375ASTW1
product price:  $6,844.99
/ea
Wilkins 10in 475 RP SS Body N Pattern NRS Gates Flng X Flng 10-475ST
Wilkins

10in 475 RP SS Body N Pattern NRS Gates Flng X Flng

Zoro # G215797150
Mfr # 10-475ST
product price:  $42,923.99
/ea
Watts Double Check Valve, W774, 12in, 35-3/4inH 774-NRS
Watts

Double Check Valve, W774, 12in, 35-3/4inH

Zoro # G2199331
Mfr # 774-NRS
product price:  $32,860.99
/ea
Backflow Preventers (650 items) - Page 11
  • First
  • Previous
  • 11
    of 19 pages
  • Next
  • Last

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 ValvesSolenoid ValvesValve PartsCamlock Fittings
Copper FittingsPVC Pipe FittingsPress-Fit Tube FittingsBrass Pipe FittingsPipe & Tube Clamps
double checkbackflow check preventer4 in backflow preventerbackflow preventersizehose connection vacuum breaker
4 in no hubwatts back-flow preventerbackflow check175 psi pressure switch1-1/2 in backflow 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

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