Badger Meter M-Series M5000 - Manual (Page 10)

Pipe Reducer Requirements
With pipe reducers, a smaller meter can be mounted in larger pipelines . This arrangement may increase low-flow accuracy .
There are no special requirements for standard, concentric, pipe reducers .
Custom fabricated pipe reducers must have an approximate slope angle of 15 degrees to minimize flow disturbances and
excessive loss of head . If this is not possible, install the custom pipe reducers as if they were fittings and install the required
amount of straight pipe
Figure 9: Pipe Reducer Requirements
Chemical Injection Applications
For water line applications with a chemical injection point, install the meter upstream of the injection point . This eliminates
any meter performance issues .
Figure 10: Chemical Injection Point Upstream of Meter
If a meter must be installed downstream of a chemical injection connection, the distance between the meter and the
injection point should be between 50 and 100 feet (15 and 30 meters) . The distance must be long enough to allow the water
or chemical solution to reach the meter in a complete, homogeneous mixture .
Figure 11: Chemical Injection Point Upstream of Meter
If the injection point is too close, the meter senses the two different conductivities for each liquid . This will likely result in
inaccurate measurements . The injection method—spaced bursts, continuous stream of drips or liquid or gas—can also affect
downstream readings by the meter .
Meter location, orientation and applications
MAG-UM-00219-EN-03 Page 10 August 2014