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Compatibility and installation

The flow sensor installation should be performed by a certified professional in accordance with local and national building codes.

The flow sensor is designed to be installed only with NPT valves and not with PEX valves.

Technical specifications
Dimensions FS4220:
  • Length: 60 mm (2.36 in)
  • Sensor diameter: ¾ in NPT x ¾ in NPT
Dimensions FS4221:
  • Length: 66 mm (2.60 in)
  • Sensor diameter: 1 in NPT x 1 in NPT
Material:
  • 304 stainless steel, lead-free
Hydraulic pressure resistance:
  • 1.75 MPa (244 PSI)
Certifications and warranty

Complies with ANSI B120.1 standard
Complies with NSF/ANSI 61 standard

Limited 3-year warranty

Included in the Box
  • 1 flow sensor FS4220 or FS4221
  • Installation guide – French version
  • Installation guide – English version