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Double Check Backflow Preventers
By Watts

Help to protect yourself, your family and your customers with backflow devices from PlumbingSupply.com®. These industrial quality backflow preventers are offered in an array of configurations that will take care of your heavy duty and commercial needs, helping protect your water supply from the potential risk of contamination.

Series 007 Double Check Valve Backflow Preventer with Quarter Turn Valves

example of the Watts 007-QT double check back flow preventer
This double check valve features:
  • Prevents the backflow of polluted water from contaminating the potable water supply
  • Single cover for ease of maintenance
  • Top mounted test cocks
  • Bronze body for long-lasting performance
  • No special tools required for servicing
  • Maximum working pressure: 175 psi
  • 2014 Federal Safe Drinking Water Act compliant
  • Click here for dimensions
Series 007 Double Check Backflow Preventer -
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Series 719 Double Check Valve Backflow Preventer with Quarter Turn Shutoff

picture of the Watts double check backflow preventer series 719
This double check valve features:
  • Non-reversible checks with captured springs prevents the backflow of polluted water from contaminating the potable water supply
  • Plastic on plastic check guiding reduces potential binding due to mineral deposits
  • Separate access, top entry check valve design
  • Reversible seat disc rubber extends check valve life
  • Chloramine resistant elastomers
  • Compact design allows for efficient installation
  • 1/2", 3/4", and 1" sizes have tee handles
  • No special tools required for servicing
  • Maximum working pressure: 175 psi
  • 2014 Federal Safe Drinking Water Act compliant
  • Click here for detailed dimensions
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Series 009 Reduced Pressure Zone Backflow Preventer with Quarter Turn Valves

image of the Watts 009QT backflow preventer
This backflow preventer features:
  • Designed to protect potable water supplies as required by national plumbing codes and water authority requirements
  • Large body passages provides low pressure drop
  • Compact, space saving design
  • Single access cover and modular check construction for ease of maintenance
  • Top entry so all internals are immediately accessible
  • Internal relief valve for reduced installation clearances
  • Screwdriver slotted ball valve test cocks
  • No special tools required for servicing
  • 2014 Federal Safe Drinking Water Act compliant
  • Maximum working pressure: 175 psi
  • Click for internal diagram
  • Click here for detailed dimensions
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Series 919 Reduced Pressure Zone Backflow Preventer with Quarter Turn Valves

image of the Watts 919 reduced pressure backflow preventer
This reduced pressure backflow preventer features:
  • A pressure differential relief valve is located in a zone between two positive-seating check valves to prevent backflow due to back siphonage and/or back pressure
  • Compact, space saving design
  • Separate access covers for the check valves and relief valve for ease of maintenance
  • Top entry so all check internals are easily accessible
  • All rubber elastomers of chloramine resistant material
  • Check valve poppet assemblies are fully guided by innovative plastic seat guide
  • Bottom mounted relief valve provides reduced installation clearances
  • NPT body connections
  • No special tools required for servicing
  • 2014 Federal Safe Drinking Water Act compliant
  • Maximum working pressure: 175 psi
  • Click for dimensions
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Series 909 Bronze Reduced Pressure Zone Backflow Preventer

This reduced pressure backflow preventer features:
  • A pressure differential relief valve located in a zone between two positive seating check valves prevents back siphonage and back pressure of hazardous materials into the potable water supply
  • Model HW includes stainless steel check modules suitable for temperatures up to 210°F and harsh water conditions
  • Sizes 3/4" and 1" shutoffs have tee handles
  • Compact design for ease of installation
  • Designed for horizontal or vertical installations
  • No special tools required for servicing
  • NPT threaded connections
  • 2014 Federal Safe Drinking Water Act compliant
  • Maximum working pressure: 175 psi
  • Click for dimensions
Size QT HW
3/4" $702.68 $967.18
1" $804.31 $1,127.44
1-1/4" $1,442.36 $2,062.50
1-1/2" $1,556.19 $2,230.67
2" $1,796.32 $2,563.65
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Pressure Vacuum Breakers For Sprinkler Systems

example of a small Watts pressure vacuum breaker
This vacuum breaker features:
  • For use with sprinkler systems
  • Bronze body
  • Silicon rubber check valve disc
  • Plastic check valve seat
  • Stainless steel springs
  • Lightweight plastic disc float
  • Click here for detailed dimensions
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Frequently Asked Questions

Q. "Where would I find double check backflow preventer valves?"
A. Double check valve assembly backflow preventers are often found on water lines servicing fire sprinkler systems, commercial swimming pools, water treatment tanks, to name a few. Local code will specify what items in your area requires which specific type of backflow prevention device. Always consult your local code authorities with any questions regarding backflow prevention.

Q. "I'm hearing a lot about lead-free these days. What does that have to do with plumbing products and how does the new lead-free legislation affect me?"
A. Basically, the laws implemented Jan. 1st, 2014 require plumbing products that come in contact with drinking water to be "essentially lead free" (less than 0.25% weighted average). For further information about how the law determines what is "lead free", rules regarding which plumbing products must be "lead free", and who these laws will affect, please click here.

Q. "What is a test cock?"
A.Test Cocks are used to facilitate backflow assembly testing or as isolation valves for gauges or small equipment lines.

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