Module 3

Module Pages

• Learning Objectives
• Methods Used to Prevent Backflow 1
• Methods Used to Prevent Backflow 2
• Considerations for Backflow Prevention Device Assemblies
• Air Gap
• Check Valves
• Velocity and Check Valves Relationship
• Reduced Pressure Principle Backflow Prevention Device Assembly
• Reduced Pressure Principle Backflow Prevention Device Assembly Test Cocks and valves
• Reduced Pressure Principle Backflow Prevention Device Assembly Relief Valve
• Reduced Pressure Principle Backflow Prevention Device Assembly Relief Valve Discharge Intermittently
• Reduced Pressure Principle Backflow Prevention Device Assembly Relief Valve Drainage
• Reduced Pressure Principle Backflow Prevention Device Assembly Relief Valve Catastrophic Discharge
• Reduced Pressure Principle Backflow Prevention Device Assembly Relief Valve Drainage Quality
• National Pollutant Discharge Elimination System (NPDES)
• Reduced Pressure Principle Backflow Prevention Device Assembly Check Valve Springs
• Reduced Pressure Principle Backflow Prevention Device Assembly Relief Valve Spring and Operation
• Reduced Pressure Principle Backflow Prevention Device Assembly Pressure Losses
• Reduced Pressure Principle Backflow Prevention Device Installed on Service Line Backflow Condition - Fouled Second Check Valve
• Reduced Pressure Principle Backflow Prevention Device Assembly Rate of Flow and Pressure Loss
• Reduced Pressure Principle Backflow Prevention Device Assemblies Installed on Fire Protection Systems – Reduced Pressure Principle Detector Assemblies
• Operating Principles of a Reduced Pressure Principle Backflow Prevention Device Assembly Out of the Box or Dewatered
• RPZ in a Flow or Dynamic State – Relief Valve Closed
• RPZ in a Flow or Dynamic State – First Check Valve Opened
• RPZ in a Flow or Dynamic State – Second Check Valve Opens
• RPZ in a Flow or Dynamic State – Relief Valve Discharges Water
• RPZ in a No-Flow or Static State and Relief Valve Opened Discharging Continually First Check Fouled Open and Second Check Valve Closed Tight
• RPZ in a Backpressure Backflow State – First and Second Check Valves Holding Tight Relief Valve Closed NOT Discharging
• Backpressure Backflow - First Check Valve Fouled Open - Second Check Valve Holding Tight Relief Valve Opened Discharging
• Backpressure Backflow – First Check Valve Tight - Second Check Valve Fouled Open Relief Valve Opened Discharging Constantly or Intermittently
• Backpressure Backflow – First Check Valve Tight - Second Check Valve Fouled Open Relief Valve Opened Discharging Constantly or Intermittently
• Backsiphonage Backflow – Relief Valve Opened – First and Second Check Valves Closed
• Backsiphonage Backflow – Relief Valve Opened – First Check Valves Fouled Open and Second Check Valve Closed
• Backsiphonage Backflow – Relief Valve Opened – First Check Valve Closed and Second Check Valves Fouled Open
• Backsiphonage Backflow – Relief Valve Opened – Both Check Valves Fouled Open
• Relief Valve Will Not Open During Dynamic or Static State
• The Double Check Valve Device Assembly
• The Double Check Valve Device Assembly - Test Cocks and Check Valve Springs
• The Double Check Valve Device Assembly - Check Valve Springs and Design Standards
• The Double Check Valve Device Assembly – Rate of Flow and Pressure Loss
• The Double Check Valve Device Assembly – Pressure Loss
• The Double Check Valve Device Assembly – Use and Installations
• The Double Check Valve Device Assembly Shape and Sizes
• The Principle Operation of a Double Check Valve Backflow Prevention Device Assembly The Double Check Valve Device Assembly (DCVA) – No-Flow or Static State
• The Double Check Valve Device Assembly (DCVA) – Flow or Dynamic State
• The Double Check Valve Device Assembly (DCVA) – Flow or Dynamic State with Backpressure First and Second Check Valves Holding Tight
• The Double Check Valve Device Assembly (DCVA) – Flow or Dynamic State with Backpressure Second Check Valve Fouled Open and First Holding Tight
• The Double Check Valve Device Assembly (DCVA) – Flow or Dynamic State with Backpressure Second Check Valve Holding Tight and First Check Valve Fouled Open
• The Double Check Valve Device Assembly (DCVA) – Flow or Dynamic State with Backpressure Second and First Check Valve Fouled Open
• The Double Check Valve Device Assembly – Flow or Dynamic State with Backsiphonage First and Second Check Valves Holding Tight
• The Double Check Valve Device Assembly – Flow or Dynamic State with Backsiphonage First Check Fouled Open and Second Check Valve Holding Tight
• The Double Check Valve Device Assembly – Flow or Dynamic State with Backsiphonage First Check Closed Tight and Second Check Valve Fouled Open
• The Double Check Valve Device Assembly – Flow or Dynamic State with Backsiphonage First and Second Check Valve Fouled Open
• The Principle Operation of a Pressure Vacuum Breaker Backflow Prevention Device Assembly
• The Principle Operation of a Pressure Vacuum Breaker Backflow Prevention Device Assembly Check Valve and Air Inlet Valve Springs
• The Principle Operation of a Pressure Vacuum Breaker Backflow Prevention Device Assembly - Installation Considerations
• The Principle Operation of a Pressure Vacuum Breaker Backflow Prevention Device Assembly - Typical Installations
• The Principle Operation of a Pressure Vacuum Breaker Backflow Prevention Device Assembly - Air Inlet Valve and Drainage
• The Principle Operation of a Pressure Vacuum Breaker Backflow Prevention Device Assembly - No Water out-of-the-box
• The Principle Operation of a Pressure Vacuum Breaker Backflow Prevention Device Assembly - Flowing or Dynamic State
• The Principle Operation of a Pressure Vacuum Breaker Backflow Prevention Device Assembly - Flow Capacity
• Pressure Vacuum Breaker Backflow Prevention Device Assembly - No Flow or Static State
• Pressure Vacuum Breaker Backflow Prevention Device Assembly - Pressure Loss Across the Check Valve Dynamic State
• Pressure Vacuum Breaker Backflow Prevention Device Assembly - Backflow Backsiphonage
• Pressure Vacuum Breaker Backflow Prevention Device Assembly - Backsiphonage Condition – Check Valve Not Drip Tight
• The Principle Operation of a Spill-Resistant Pressure Vacuum Breaker - Backflow Prevention Device Assembly
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Check Valve and Air Inlet Valve Springs
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Installation Considerations
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Typical Installations
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Air Inlet Valve and Drainage
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - No Water out-of-the-box
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Flowing or Dynamic State
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Flow Capacity
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - No Flow or Static State
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Pressure Loss Across the Check Valve - Dynamic State
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Backsiphonage Condition
• Spill-Resistant Pressure Vacuum Breaker Backflow Prevention Device Assembly - Backsiphonage Condition – Check Valve Not Drip Tight
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Check Valve and Air Inlet Valve
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Installation Considerations
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Typical Installations
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Air Inlet Valve and Drainage
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - No-Water Out of the Box
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Flowing Dynamic State
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Flow Capacity
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - No-Flow Static State
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Pressure Loss – Dynamic State
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Backflow Backsiphonage
• The Principle Operation of an Atmospheric Vacuum Breaker Backflow Prevention Device - Backflow Backsiphonage – Check Valve Not Holding Tight
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – Check Valve and Atmospheric Vent
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – Installation Considerations
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device –Typical Installations
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – Intermediate Atmospheric Vent and Drainage
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – No Water Out of the Box
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – Flowing or Dynamic State
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – Flow Capacity
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – Pressure Loss Across Check Valves Dynamic State
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – No Flow or Static State
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – Backflow Backpressure
• The Principle Operation of a Dual Check Valve with Intermediate Atmospheric Vent - Backflow Prevention Device – Backflow Backsiphonage
• Dual Check Valve with Intermediate Atmospheric Vent Backflow Prevention Device – Backflow Condition - First Check Valve Not Drip Tight
• Dual Check Valve with Intermediate Atmospheric Vent Backflow Prevention Device - Backflow Condition - Second Check Valve Not Drip Tight
• Dual Check Valve with Intermediate Atmospheric Vent Backflow Prevention Device - Backflow Condition - First and Second Check Valve Not Drip Tight
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - General Specifications
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - Check Valves and Check Valve Springs
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - Installation Considerations
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - Typical Installations
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - No Water Out of the Box
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - Flowing or Dynamic State
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - Flow Capacity
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - Pressure Loss Across Check Valves - Dynamic State
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - No Flow or Static State
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - Backflow Backpressure - Condition Both Check Valve Holding Tight
• The Principle Operation of a Dual Check Valve Backflow Prevention Device - Backflow Backsiphonage Condition Both Check Valve Holding Tight
• Dual Check Valve Backflow Prevention Device – Backflow Backpressure Condition - First or Second Check Valve Not Drip Tight
• Dual Check Valve Backflow Prevention Device – Backflow Backsiphonage Condition - First or Second Check Valve Not Drip Tight
• The Principle Operation of a Hose Bibb Vacuum Breaker Backflow Prevention Device - General Specifications
• The Principle Operation of a Hose Bibb Vacuum Breaker Backflow Prevention Device - Installation
• The Principle Operation of a Hose Bibb Vacuum Breaker Backflow Prevention Device - Continuous Pressure and Backpressure
• The Principle Operation of a Hose Bibb Vacuum Breaker Backflow Prevention Device - Backflow Prevention
• The Principle Operation of a Hose Connection Dual Check Valve Vacuum Breaker - Backflow Prevention Device - General Specifications
• The Principle Operation of a Hose Connection Dual Check Valve Vacuum Breaker - Backflow Prevention Device - Installation Considerations
• The Principle Operation of a Hose Connection Dual Check Valve Vacuum Breaker - Backflow Prevention Device – Continuous Pressure and Backpressure
• The Principle Operation of a Hose Connection Dual Check Valve Vacuum Breaker - Backflow Prevention Device - Backflow Prevention Backsiphonage Condition
• The Principle Operation of a Hose Connection Dual Check Valve Vacuum Breaker - Backflow Prevention Device - Backflow Prevention Backpressure Condition
• The Principle Operation of a Laboratory Faucet Dual Check Vacuum Breaker - Backflow Prevention Device - General Specifications
• The Principle Operation of a Laboratory Faucet Dual Check Vacuum Breaker - Backflow Prevention Device - Installation Considerations
• The Principle Operation of a Laboratory Faucet Dual Check Vacuum Breaker - Backflow Prevention Device - Continuous Pressure and Backpressure
• The Principle Operation of a Laboratory Faucet Dual Check Vacuum Breaker - Backflow Prevention Device - Backflow Prevention Backsiphonage Condition
• The Principle Operation of a Laboratory Faucet Dual Check Vacuum Breaker - Backflow Prevention Device - Backflow Prevention Backsiphonage Condition Check Valve Failure
• The Principle Operation of a Laboratory Faucet Dual Check Vacuum Breaker - Backflow Prevention Device - Backflow Prevention Backpressure Condition Check Valve Failure
• The Principle Operation of a Backflow Prevention Device for Beverage Dispensing Equipment - General Specifications
• The Principle Operation of a Backflow Prevention Device for Beverage Dispensing Equipment - Installation Considerations ASSE 1032 and ASSE 1022
• The Principle Operation of a Backflow Prevention Device for Beverage Dispensing Equipment - Installation Considerations
• The Principle Operation of a Backflow Prevention Device for Beverage Dispensing Equipment - Normal Operation and Pressure Loss
• The Principle Operation of a Backflow Prevention Device for Beverage Dispensing Equipment - Backflow Prevention Backpressure Condition
• The Principle Operation of a Backflow Prevention Device for Beverage Dispensing Equipment - Backflow Prevention Backsiphonage Condition
• The Principle Operation of Chemical Dispensers
• Freeze Resistant Sanitary Yard Hydrants with Backflow Protection
• The Principle Operation of a Barometric Loop Backflow Prevention Method
• Fire Hydrant Backflow Prevention Device Assemblies with Meter - General Discussion
• Fire Hydrant Backflow Prevention Device Assemblies with Meter - Installation
• Strainers for Backflow Prevention Device Assemblies - General Specifications
• Strainers for Backflow Prevention Device Assemblies - Installations
• Pressure Reducing Valves and Backflow Prevention Device/Assemblies - General Specifications
• Pressure Reducing Valves and Backflow Prevention Device/Assemblies Installation
• Freeze Protection Valves
• Draining a Backflow Prevention Device Assembly