WATTS® 0388001 Anti-Siphon Pressure Vacuum Breaker With Quarter Turn Ball Valve Shutoff, 3/4 in Nominal, FNPT End Style, Bronze Body, 7.5 fps Flow Rate, Domestic

WA800QTI MFG #: 800M4QT-3/4
  • Body Material: Bronze
  • Country of Origin: US
  • Dimensions: 6-1/2 in L x 6-1/2 in H
  • Domestic/Import: Domestic
  • End Style: FNPT
  • Flow Rate: 7.5 fps
  • Manufacturer Name: Watts Water Technologies
  • Nominal Size: 3/4 in
  • Port Type: Drain/Blow Down
  • Pressure Rating: 150 psi
  • Series: 800M4QT
Series 800M4QT Anti-Siphon Pressure Vacuum Breakers prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It consists of bronze body construction, silicone rubber check valve disc, plastic check valve seat, stainless steel springs, a bonnet with silicone rubber O-ring seal, a lightweight plastic disc float, tee handle or lever handle shutoffs, and test cocks for winterization draining. Series 800M4QT is ideal in health hazard continuous pressure applications such as irrigation systems and industrial process water systems where the water enters the equipment at or below its flood rim. Maximum Pressure:150 psi (10.3 bar), Minimum Pressure: 15 psi (55 kPa).
  • Features and More


  • Durable, bronze body construction
  • Female NPT inlet and outlet with quarter turn shut-offs
  • Replaceable plastic seat
  • Easy maintenance of internal parts
  • Acetyl bonnet acts as freeze plug to prevent body damage
  • O-ring bonnet seal for less possibility of fouling
  • Silicone seat disc for durability
  • Test cocks positioned for easy testing and winterization
  • Compact space saving design
  • No special tools required for servicing


  • Health Hazard


  • ANSI/ASSE 1020
  • Approved by the foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
  • cCSAus Certified
  • UPC Listed
  • USC Certified
  • PROP65: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.


  • 1 year Limited