4 OMNI installation
Required tools
Correct tools for the corresponding size of bolts that are used. In the case of the R2,
5/8" bolts are used for the 1-1/2" R2 and ¾" bolts are used for the 2" R2.
Depending on the weight of the meter and the installation conditions, hosting
devices may be required.
Installation factors
To ensure valid registration, proper performance, and meter longevity, the following
factors should be considered when installing Sensus OMNI Meters.
1. When installing a Sensus OMNI Meter with the strainer, a minimum of 2-½ pipe
diameters of straight run of pipe or equivalent full open components is required
upstream and downstream of the meter or strainer flanges. Full open flow
components may consist of: straight pipe, full open gate valves, bypass tees, all of
the same nominal size as the meter, and concentric reducers (one nominal pipe size
reduction only).
2. Gate valves located immediately upstream or downstream are acceptable, provided
they are fully open during meter service and are not used to throttle flow rates
through the meter.
3. Install non-concentric reducers, check valves, back flow preventers, pressure
reducing valves (PRV), throttling devices, and altitude valves no closer than four pipe
diameters downstream of the meter. Always avoid placing any of these devices
upstream of any meter since the placement will put the meter in a low pressure zone
thus possibly causing inconsistent accuracy and reduced longevity.
4. Accuracy levels may be determined by comparison accuracy testing either by using
a Sensus Portable Large Meter Tester, by removing the suspect meter and testing it
on a calibrated test bench, or by returning the suspect measuring chamber or
complete meter to Sensus Metering for a certified accuracy test.
Note: High flow meter applications or near to open air discharge must
maintain a minimum of 25 psi downstream pressure to assure accuracy and
meter longevity.
4 OMNI installation | 16
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