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Brass flow switch with paddle, 1-inch NPT connections

Taco Inc

Taco Inc IFSH1BF-1 1" SPDT Flow Switch 1500 gpm

SKU CH-HTG9-AKW3T

A 1-inch SPDT paddle flow switch rated for 1500 gpm maximum flow with 22 A contact rating at 125/250 VAC

  • 1" NPT brass paddle switch fits standard pipe
  • SPDT contacts handle 22 A at 125/250 V AC
  • Operates from 4.5 gpm up to 1500 gpm
  • Media temperature range 32 °F to 250 °F
  • Rated for 24 V, 125 V and 250 V at 60 Hz

Taco 1" SPDT Flow Switch

The Taco IFSH1BF-1 is a paddle-type flow switch designed for 1-inch NPT piping. It monitors liquid flow in hydronic heating, cooling or industrial process lines. The brass housing withstands media temperatures from 32 to 250 degrees F and ambient conditions up to 176 degrees F. It suits contractors and facility managers who need reliable flow verification.

Replaces failed paddle switches

This unit serves as a direct replacement for worn or failed 1-inch paddle switches in existing piping. The switch activates between 4.5 and 1500 gpm, covering a broad range of flow conditions. The upgrade is worthwhile when the current switch no longer provides consistent contact closure or when the housing shows corrosion or leakage.

Sustained flow monitoring

Under continuous operation the SPDT contacts are rated for 22 A at 125 or 250 VAC and 15 A at 125 or 250 VDC. The brass body and paddle resist scaling and corrosion during long-term exposure to heated or chilled water. The mechanism maintains its calibration across the full 32 to 250 degree F media range without drift.

Highlights

  • 1" NPT brass paddle switch fits standard pipe
  • SPDT contacts handle 22 A at 125/250 V AC
  • Operates from 4.5 gpm up to 1500 gpm
  • Media temperature range 32 °F to 250 °F
  • Rated for 24 V, 125 V and 250 V at 60 Hz

Specifications

BrandTACO

Questions about this item

What 1" NPT pipe size does this brass flow switch fit?

The switch has a 1-inch NPT connection and is made for 1-inch pipe, so it threads directly into a standard 1-inch NPT fitting.

How do I wire the SPDT contacts during installation?

Connect the three SPDT terminals to your 24, 125 or 250 VAC control circuit; the contacts handle up to 22 A at 125/250 VAC or 15 A DC at the same voltages.

When should I replace the paddle mechanism on this switch?

Inspect the brass paddle annually for wear or scale; replace it if the switch no longer trips reliably between the 4.5 gpm minimum and 1500 gpm maximum flow rates.

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