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OMNI Installation 2
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 3/4” bolts are used for the 2” R2.
• Hoisting devices may be required, depending on the weight of the meter and the
installation conditions.
Installation Instructions
To ensure valid registration, proper performance, and meter longevity, the following
factors should be considered when installing Sensus OMNI Meters.
1. When installing 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 (1 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, PRV
(pressure reducing valves), throttling devices, altitude valves no closer than 4 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 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.
OMNI meters can be installed vertically or rotated on the bolt pattern in any
orientation. Contact Sensus with any questions.
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