Large Meter (over 2") Test Systems

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The Large Meter Test Bench System developed by MARS Company employs the latest in design and process control technology, setting the worldwide standard for the large meter testing and management industry. This versatile system can be configured to meet the testing needs of virtually any large meter management organization.

MARS Test Bench Systems are designed to meet / exceed American Water Works Association (AWWA) recommendations, National Institute for Standards and Technology (NIST) Handbook 44 Specifications, ISO Specifications and other standards and requirements.

Revenue Recovery

Understanding how your meters perform in the field will allow you to reduce unaccounted for water in your system.

Increase Confidence

Designed to operate using Volumetric or Gravimetric technology and to meet/exceed AWWA, ISO and NIST specifications.

Simplify Operations

Automation is available with Gravimetric and MARS M3 Meter Management Software integrations.

Typical Applications

Water utilities or water meter manufacturers requiring the testing of meters from 3” to 16” sizes (larger sizes available)

Tests meters of all lengths and types

Where testing to a higher standard of accuracy and repeatability is required

Where improvements to revenue, manpower utilization, efficiency, and safety are needed

Tests turbine, compound, and fire-line meters of all lengths and types

Tests detector check valves and backflow preventers from 3” to 16” sizes

Standard and Optional Features

Available on every Large Meter Test Bench System configuration.
* Denotes Optional Items, contact MARS for details

10 Gal./1 Cu.Ft. and 100 Gal./10 Cu.Ft. Stainless Steel Duplex Tank.

1500/2500/3500/5000 Gal. Stainless Steel Tank with Load Cells (Configuration Dependent)

Learn More about MARS Test Tanks

Three (3) precision rotameters that cover a flow range from .1 – 160 GPM and Gravimetric Control.

Corrosive Protection (polyester coated steel bench frame).

All meter adapters, meter and adapter gaskets, manual flow control valves, document station, electric actuated clamping device, meter support fixtures.

Provided in all sizes relevant to test bench size parameters and constructed of Sch. 40 steel pipe with 1D flanges welded at both ends and modified to accept o-rings using square groove technology on reducing spools and spacer flanges.

All spools are coated inside and out according to frame specifications and select spools are configured with straightening vanes to minimize or reduce turbulence and allow for conformance with AWWA specifications and recommendations.

The MARS Company Gravimetric System includes a scale, console, computer, printer, display and the MARS M3 Meter Management Software.

The Test Bench, with the Gravimetric System, is traceable to NIST (National Institute for Standards and Technology) Handbook 44 specifications, providing 1/10% repeatable accuracy.

  • Motion detection range setting unit
  • Alarm to prevent over-flow
  • Run test sequence by time or volume
  • Five selectable units of measure (gallons, cu. ft., cu. meters, imperial gallons and pounds)
  • Units can be modified per customer request
  • User selectable test names or line names (example: Q-Min or .5” line)
  • Auto drains the tanks after the test or holds the water in the tank in order to stack test (scale automatically zeros after each test)
  • Built in leak detection on scale, after the test with a variable leak check
  • Selectable purge of one line or all lines based on a time which is operator adjustable
  • Emergency stop or test abort in all phases
  • Auto compensating free-fall adjustment (PRE-ACT) to stop test on target value
  • Units are set up for computer and or printer interface
  • Control software is upgradeable
  • The scales are a NIST approved class III weighing device
  • The weighing devices are traceable to Handbook 44 specifications
  • System accuracy is ¼ of one percent and repeatable to 1/10 of one percent

Learn More about MARS M3 Enterprise Software

The Recirculation System recycles the test water used on the MARS Test Bench, maintaining volume and pressure to test the meters at the recommended AWWA Specifications, per Table 5-3 of the current AWWA M6 Manual.

Benefits include but are not limited to: compliance with local, state and/or Federal laws and regulations as it reduces the chemicals released into the environment; an immediate reduction in consumption and water dumped to waste after each test; Improved customer perception as the Water District sets an example for water conservation practices.

Learn More about MARS Recirculation Systems

  • Utilizes municipal (public) service to supply the needed water to the test system
  • The water is drained from the measurement tank and then directed to the storm drain, municipal sewer, or wherever the user sees fit
  • The water service must be able to provide a pre-determined flow at a specific pressure (requirement depends on bench size and specifications) in order to achieve proper test results
  • Not recommended in situations where the cost of water is high or water conservation is desired

With MARS Certified, you can protect both MARS and selected third-party equipment with technical assistance, software upgrades, preventative maintenance, spares management and on-site maintenance.

Not only is the equipment upkeep essential, but ensuring all operators are fully trained on meter testing practices and procedures is critical.

Learn More about MARS Maintenance Calibration Certification (MCC)

Intrinsically safe

  • Eliminates shock and explosive hazards from hydraulic conditions
  • Designed to minimize physical fatigue
  • Built to withstand any forces applied within the scope of its use
  • Easy to operate controls to minimize operator errors

Meter Support Fixtures

  • Referred to as “trolleys”
  • Designed to support the meters during installation and testing
  • Equipped with rollers made of UHMW nylon, or suitable rubber
  • Roll entire length of test bench
  • Constructed of welded steel and coated to frame specifications
  • Equipped with adjustable V-blocks for lifting meters and spools into place

Control Panel

  • Nema-4 or 12 enclosure
  • Grey enamel finish
  • Completely pre-wired to operate all test system functions
  • Equipped with Emergency Stop and Power On switch
  • Industrial momentary and multi-position selector switches

Meter Clamping

  • Utilizes hydraulic driven cylinder to compress meters and the spool spacers, eliminating the need for nuts and bolts
  • The motion operator is controlled by an easy to use control box at moving end of the bench
  • The movable flange section is designed to adapt to all meter sizes within the specified parameters of the test bench
  • Movable flange range of motion is eighteen inches
  • Movable flange is equipped with locator pins to align meters and prevent accidental misalignment and blowouts
  • Utilizes 5/16” O-rings and square groove technology
  • Motion operator and movable flange have a working pressure rating of 150 PSI and has been safely tested at 300 pounds static
  • Movable flange section is supported by a support tower which is a welded steel frame coated exactly like the test bench
  • Pressure release valve to ensure safety by prohibiting the bench to open until pressure is released.
  • Tethered user-friendly remote-control module to provide extra level of safety while loading or unloading meters.
  • NOTE: In order to enhance safety and leak prevention, it is recommended that meters 8” and above be bolt assisted to hold the meters in place when being tested. The required compression force to safely test these larger meters exceeds the 3” through 6” meters’ compression limits.


  • Fabricated steel
  • Welded in accordance to standard industry practices and certifications
  • Capable of compressive and hydraulic forces equal to fifteen thousand pounds of pressure
  • Total weight rating of ten thousand pounds without distortion or misalignment
  • Stainless steel load bearing surface at side rails


  • Polyester Coating in MARS Blue
  • Minimum of 20 years resistance to corrosion
  • High impact resistance
  • All steel is fully sandblasted and treated with Atochem rust proof primer before being coated for total bonding
  • Frame is not touched by human hands within at least 2 hours of drying
  • Coating is applied using the electrostatic method, then placed in an oven at 495 degrees F until fully bonded
  • The frame is electrostatically spark tested to detect defects

Splash Pans

  • Stainless steel construction
  • Extends full width and length of test bench
  • Built in panels of 10 feet or less to facilitate removal and cleaning
  • Drip free
  • 1 inch in 10 feet slope to lowest point where a stainless-steel nipple will be welded for drain tie-in

Flex Joint Assembly

  • Bench is connected to water supply line utilizing a flex joint assembly
  • Allows the travel not less than 18 inches
  • Supported by a welded and coated stand

Document Station

  • Designed to cover motion operators and hold forms, pencils, etc.
  • Hinged lid
  • Angled writing surface with lip
  • Durable Formica construction
  • Stainless steel hardware

Test Spool Assemblies

  • Provided in all sizes relevant to test bench size parameters
  • Coated in and out according to frame specifications
  • Equipped with alignment spacer flanges
  • Select Spools are configured with straightening vanes to minimize or reduce turbulence and allow for conformance with AWWA specifications and recommendations
  • Constructed of Sch. 40 steel pipe with 1D flanges welded at both ends
  • Modified to accept O-rings using square groove technology on reducing spools and spacer flanges
  • Stainless alignment pins are uncoated 316 stainless steel
  • Equipped with lifting handle for ease of movement and safety

Three Precision Rotameters

  • Low flow measurement of .1 to 1.5 GPM
  • Medium flow measurement of 1.5 to 15 GPM
  • High flow measurement of 15 to 60 GPM or 6 to 160 GPM

Low Flow Measurement Tanks

  • One set of 10/100 Gallon Stainless Steel Duplex Tanks STANDARD for all test bench sizes
  • Tank volumes of 10 Cu.Ft. / 100 US gallons and 1 Cu.Ft. / 10 US gallons
  • Tank option: one duplex tank 10/100 or one (1) 10 Gallon Tank and one (1) 100 Gallon Tank
  • Based on standard dimensions, custom tanks can be fabricated upon request
  • Stainless steel construction
  • Built in accordance with industry safety and seismic standards
  • Automated select valves to migrate from low-flow to high-flow (or vice versa)

High Flow Measurement Tanks

  • Size of tanks depend upon the test bench parameters and output requirements
  • Standard sizes are as follows: 1500 US gallons, 2500 US gallons, 3500 US gallons, 5000 US gallons
  • All standard sizes are based on standard dimensions, custom tanks are fabricated upon request
  • Stainless steel construction
  • All tanks are built in accordance with industry safety and seismic standards
  • Automated select valves to migrate from low-flow to high-flow (or vice versa)

Ball Valves

  • Chrome plated ball with Teflon seat
  • Full port
  • 3-piece stainless steel body
  • 150 PSI rating

Butterfly Valves

  • Lug or wafer style
  • Cast or ductile iron body with EPDM or Buna-N liner
  • Stainless steel valve discs
  • 150 PSI service pressure
  • Max flow rates based on pipe diameter

Electric Ball Valve Actuators

  • Nema-4x enclosures, zinc plated, two-part polyurethane Open/Closed Angle position indicator and 90-degree operation from full open to full close in 7 seconds
  • Manual override hand wheel
  • Torque switches
  • 30% duty cycle
  • Mechanical travel stops
  • Internal heater
  • Ball bearing 110 VAC motor with thermal protection
  • Temperature range –4 to 158 degrees F
  • Life cycle: 100,000 operations minimum

Test Spools and Racks

Designed for use with MARS Large Water Meter Test Benches, MARS Test Spools and Storage Racks are built with the same high quality materials designed and configured to meet the testing needs of virtually any large meter management organization.

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Large Meter Test Bench System Model Selection

Brochures and Datasheets


Water Meter Test Bench Systems Brochure 3 MB 782 downloads

For over 30 years MARS Company has proven itself in the waterworks industry as the...

AWWA C715-18 Compliant Test Bench Upgrade Datasheet 2 MB 333 downloads

MARS Company, a global leader in water meter testing and technology solutions, offers...

Recirculation Systems Datasheet 464 KB 193 downloads

Designed for use with every MARS Test Bench System, the Recirculation provides the...

MCC Datasheet 1 MB 300 downloads

MARS Calibration, Maintenance and Support Program (MCC~MARS Calibration Certification)...

MARS VEROflow-10 (VF-10) Datasheet 182.65 KB 75 downloads


Press Releases

Is your Water Meter Test System ANSI/AWWA C715-18 Compliant?

MARS Company offers the first and only Test Bench Equipment Upgrade Program, enabling customers to upgrade their existing MARS test bench equipment to comply with the ANSI / AWWA C715-18 industry standard.

Is your Meter Shop Certified?

With MARS Maintenance Calibration Certification (MCC), you can protect both MARS and select third-party equipment with calibration, technical assistance, software upgrades, preventative maintenance, training, spares management, and on-site maintenance.