Backflow Preventers

What is a Backflow Preventer? ,[object Object],[object Object]

Selection ,[object Object],[object Object],[object Object],[object Object]

Example ,[object Object],[object Object],[object Object],[object Object],[object Object]

Types of Backflow Preventers ,[object Object],[object Object],[object Object],[object Object],[object Object]

Atmospheric Vacuum Breaker ,[object Object],[object Object],[object Object],[object Object],[object Object]

Anti-Siphon Valve ,[object Object],[object Object],[object Object],[object Object]

Pressure Vacuum Breaker ,[object Object],[object Object],[object Object]

Reduced Pressure Backflow Preventer (R.P. Unit) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Double Check Backflow Preventers ,[object Object],[object Object],[object Object],[object Object],[object Object]

Dual Check Device ,[object Object],[object Object],[object Object]

Pressure Loss to Use Between 3-5 PSI, use 5 Check Valves and Dual Checks Between 3-5 PSI, use 5 Double Check Backflow Preventer Between 8-12 PSI, use 12 to be safe Reduced Pressure Backflow Preventer Between 2 – 5 PSI, use 5 to be safe Pressure vacuum Breaker 0 Anti-Siphon valve 2 PSI Atmospheric vacuum breaker

Mainline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Calculate Pressure loss ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Valves ,[object Object],[object Object],[object Object],[object Object]

Globe or Angle Valve ,[object Object],[object Object],[object Object],[object Object]

Mainline depth ,[object Object]

Valve Operation ,[object Object],[object Object],[object Object],[object Object],[object Object]

Valve Material ,[object Object],[object Object],[object Object],[object Object]

Sizing Valves ,[object Object],[object Object],[object Object]

Rules ,[object Object],[object Object],[object Object]

Pressure Loss in valves ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Rule #2 ,[object Object],[object Object]

Rule #3 ,[object Object],[object Object],[object Object]

Lateral Pressure Loss ,[object Object],[object Object],[object Object]

Sprinkler Pressure Loss ,[object Object],[object Object]

Table ,[object Object],[object Object]

Backflow Preventers

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Backflow Preventers