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Introduction to the F-550 Flow Meter


The F-550 Flow Meter is a variable area style flow meter designed to be panel mounted into water systems. The F-550 Flow Meter has been an industry standard in the water market for over 50 years. The accuracy, simple design, easy installation, and affordable pricing make the F-550 an excellent choice for your water flow measurement needs.  

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Product Overview / Features of the F-550 Flow Meter 

  • Installs quickly. 
  • Direct reading permanent scale. 
  • Adapter sizes 1/4”, 3/8”, 1/2″, 3/4’’, 1 F/NPT. Polypropylene adapters.  
  • Panel Mount Vertical installation only. 
  • Flow rates from .025 to 20 GPM , .10 – 75 lpm. 
  • Acceptable in outdoor locations in direct sunlight.   
  • One piece machined Acrylic body. 
  • Easy to read dual scale for GPM and LPM with white back reflector.  
  • 316 SS (Or PTFE for F-55005L model) Float and 316 SS Guide Rod 
  • 1 Year Limited Warranty. 


The F-550 Flow Meter is perfect for water monitoring applications in processing plants, water systems, RO Systems, DI systems, wet processing equipment, cooling systems, and water plants.  The F-550 Flow Meter can be easily installed on panel mount systems where water is relatively clean and free of debris.  

All F-550 Flow Meters are tested with water.  F-550 Flow Meter may be used suitable for other chemicals. It is the responsibility of the user to ensure it is compatible with the chemical or application in question.  

Ordering Information and Product Matrix 

Flow meters must be ordered with a complete part number, specifying scale, adapter size, and O-ring material. A sample complete part number is F-55250LA, indicating 0.025 -.25 GPM with .25” MNPT polypropylene adapter and Viton O-rings. 

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