Air valve location

Application Table

Location in System Vacuum Breakers Continuous/
Automatic Air Release Valves
Combination
Air Valves
Source
Pump stations ✓ ✓ ✓
Upstream of pump check valves     ✓
On filter inlet manifolds ✓   ✓
On filter back-flush manifolds ✓   ✓
System Head
At all high points   ✓ ✓
Before water meters   ✓ ✓
Distribution Network
At all high points   ✓ ✓
Every 500 m     ✓
At the top of downhill sloping pipes ✓    
At the end of long distribution pipes     ✓
Upstream of on/off field control valves     ✓
Downstream of on/off field control valves ✓    
       
Location in System Vacuum Breakers Continuous/
Automatic Air Release Valves
Combination
Air Valves
Source
Pump stations ✓ ✓ ✓
Upstream of pump check valves     ✓
On filter inlet manifolds ✓   ✓
On filter back-flush manifolds ✓   ✓
System Head
At all high points   ✓ ✓
Before water meters   ✓ ✓
Distribution Network
At all high points   ✓ ✓
Every 500 m     ✓
At the top of downhill sloping pipes ✓    
At the end of long distribution pipes     ✓
Upstream of on/off field control valves     ✓
Downstream of on/off field control valves ✓    
       

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