Series WMH Multi-Jet Hot Water Meter

High Temperature Threshold, Pulsed Output

The Series WMH High Temperature Multi-Jet Water Meters are a series of mechanical, water totalizing meters that display the total water usage in gallons with m3 options. They are available in a range of body sizes and include NPT or BSPT optional couplings. The high temperature resistant brass body is compatible in applications with high temperature water no suitable with standard brass water meters and maintains its accuracy.

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Product Applications

  • HVAC applications
  • Measuring total condenser water flow in residential, commercial and industrial applications
  • Remote hot water monitoring

Models & Ordering

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Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Model Description Usually Ships* Price Order
Ships: Same Day
Price: $145.00
Multi-Jet hot water meter, 5/8" x 1/2" pipe size, 0.1 gal pulse output. Same Day* $145.00 Order
Ships: Call for Details
Price: $145.00
Multi-Jet hot water meter, 5/8" x 1/2" pipe size, 1 gal pulse output. Call for Details* $145.00 Order
Ships: Call for Details
Price: $145.00
Multi-Jet hot water meter, 5/8" x 1/2" pipe size, 10 gal pulse output. Call for Details* $145.00 Order
Ships: Call for Details
Price: $145.00
Multi-Jet hot water meter, 5/8" x 1/2" pipe size, 100 gal pulse output. Call for Details* $145.00 Order


Wetted Materials:
Body: Brass; Couplings: Brass; Measuring Chamber: Brass.
Flow Range:
See model chart on catalog page.
WMH-A-X-XX: Transitional Flow: ±3%; Nominal Flow: ±1.5%.
Temperature Limit:
190°F (88°C).
Pressure Limit:
150 psi (10 bar).
Totalizing Display Maximum:
See model chart on catalog page.
Output Signal:
Pulse output with frequency proportional to flow rate.
Pulse Options:
0.1 gal, 1 gal, 10 gal, 100 gal per pulse (1 L, 10 L, 100 L, 1000 per pulse) See model chart on catalog page. (Consult factory for m3, BSPT units or additional pulse output options)
Electrical Rating:
0.01A @ 24VAC/DC.
Electrical Connections:
Color-coded lead wires, 4.5' (1.5 m) long.
Mounting Orientation:
Horizontal with register facing up.
See dimension chart.


  • High temperature threshold of 190°F (88°C) ideal for high temperature applications
  • Multi-jet design allows for simplicity and accuracy with wide flow ranges, even in low flow applications
  • Magnetically driven, hermetically sealed register does not leak or fog and is completely separated from the water
  • Designed for long service life and maintenance-free operation
  • Integral strainer that protects meter from particulate damage
  • Easy installation with included coupling adapters
  • Pulsed output proportional to flow allows for remote flow totalization


Product Literature


Catalog Pages

Product Data Sheet




I recently purchased an WM2-A-C-01, For my application the pipe is vertical with the water flowing downward. The instructions mention that it should be mounted horizontally. Is it ok to mount vertically?
Multi-jet meters use multiple ports surrounding an internal chamber to create multiple jets of water against an impeller. The impeller rotation speed depends on the velocity of the water flow. If your water is flowing downward it will not rotate the impeller as it does in a horizontal pipe or in a up flow condition. Therefore, you cannot install this instrument in a vertical down flow application and receive accurate readings.

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