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Water Meters

Compound Water Meter

Accurate at Both Low and High Flow Rates

A Compound Water Meter is the perfect solution to measuring high and low flow rates.

They are water velocity meters that are typically used when the water flow rate varies or fluctuates on a wide scale.

This meter is used to measure cold water with flow in one direction with a high degree of accuracy.

Compound Meters consist of three main parts: a turbine meter or measuring chamber, a multi-jet or positive displacement meter or measuring chamber, and a check valve.

The turbine meter is used to measure high flow rates and the smaller meter, a multi-jet or P.P.D. Meter, is used to measure lower flow rates.

You will find that compound meters are commonly used at schools, factories, hotels, motels, apartment complexes, department stores, shopping malls and office buildings.

The flow rates for these establishments vary and so they require very accurate readings for water conservation purposes and to save money.

Meter sizes typically range from 2" to 8"; however, you may find that some companies manufacture meters up to 20" on special request.

For your safety and the safety of your surroundings, all compound meters should comply with A.W.W.A. C702 standards as well as the standards set out in your jurisdiction.

Compound meters are designed to last very long and are for the most part maintenance free, so you don’t have to worry about paying more money to change meter parts.

Advantages of Compound Meters

  1. It is more accurate than a turbine meter measuring low flow rates, so you will earn more revenue and conserve more water.
  2. It is able to measure both low and high flow rates. This reduces the chance of under billing or over billing the customer and losing future earnings.
  3. An internal strainer is located inside the meter to protect the meter from outside material.Some manufactures require an external strainer as well.


Best Compound Water Meters

 Hersey Meter, Badger Meter, Neptune Meter and others.

Magnetic Drive Positive Displacement Disc Meters

Sizes 5/8” x 1/2” and 5/8" x 3/4"





Measurement of cold water for residential and small

commercial applications where water volumes are low and low flow

sensitivity is important.




Hersey® Series 420 water meters comply

with the latest revision of ANSI/AWWA Standard C710. Each meter is fully

tested to ensure 100% compliance. Meters manufactured with advanced

Hersey Meters composite maincases meet the requirements of NSF

Standard 61.




Hersey 420 Water Meters consist of three basic parts:

maincase; measuring chamber; and permanently sealed register. The

maincase is an advanced composite material designed for reduced

weight and minimal environmental impact. Stainless steel metal threads

provide corrosion resistant connections to standard bronze couplings.

Integral gaskets simplify installation for all applications.

Direction of flow arrows, model and size are molded into each maincase for

easy identification. The bottom cover is an advanced composite material

designed with a unique internal thread that enhances the structural

integrity of the meter and is sealed with an o-ring. The measuring chamber

is molded from materials specifically designed to provide reduced wear

during operation. The measuring chamber, integral strainer, nutating

disc and thrust roller are thermoplastic, which is dimensionally stable

and will not corrode. The thrust roller moves smoothly along the chamber

diaphragm to reduce friction and maintain accuracy. The register box and

lid are molded thermoplastic. The meter is designed so that the register

can be replaced without removing the meter from the service line.




The permanently sealed register has a unique seal and heattreated

glass to eliminate dirt, moisture infiltration and lens fogging. An

integral tamper-proof locking feature is provided to resist tampering with

the register. The totalizing register has a straight-reading odometer type

display, a 360º test circle with center sweep hand and a low flow (leak)

detector. Standard gearing is used, making registers interchangeable

by size. All Hersey meter models have electronic meter reading systems

available for increased reading efficiency (see Meter Reading Systems.)




Water flows through the meter’s strainer where debris is

screened out. The incoming water fills a known volume of the measuring

chamber on one side of a movable disc that separates the chamber into

two sections. As water enters, it moves the disc (nutates), forcing a known

volume of water out of the meter from the opposite side of the disc. The

process repeats as the sections refill and empty in turn. The nutating

action of the disc is coupled magnetically to the register to indicate the

highly accurate volume of water that passes through the meter.




The Hersey Series 420 Water Meter is designed and

manufactured to provide long service life with virtually no maintenance





Supplied with stainless steel metal external straight

pipe threads

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East Point, Georgia 30344