FM-40 1″ Flow Meter

Measure water usage

METER’s flow meter offerings combine the accuracy of positive displacement meters with the reliability and economy of nutating disc technology. Constructed out of engineered polymer, our flow meters are user serviceable and certified to NSF/ANSI Standards 61 and 372. The meters include a magnetically driven register, a pulse transmitter for digital output (no power required), and meter connection fittings. These meters offer minimal pressure loss making them ideal for retrofitting existing irrigation systems.


Typical Operating Range0.75 to 50 gpm
Low Flow (min. 98.5%)0.375 gpm
Maximum Continuous Operation25 gpm
Pressure Loss at Maximum Continuous Operation3.1 psi
Maximum Operating Temperature26 °C
Maximum Operating Pressure150 psig
Meter Connection Tailpiece Thread1” male NPT
Pulse Transmitter Resolution1 pulse = 1 gallon
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California requires the following notice

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

FM-40 1″ Flow Meter