Shopping Cart

Your cart is empty.

Your cart is empty.

McDonnell & Miller FS251 General Purpose Flow Switch, 1' Replaces Fs4-3

4.5 (2) Write Review
Free shipping on orders over $29.99

$174.40

$ 86 .99 $86.99

In Stock

About this item

  • Product Type :Electronic Component
  • Package Dimensions :9.1 Cm L X10.4 Cm W X21.3 Cm H
  • Country Of Origin :United States
  • Package Weight :1.0Lbs


FS251, McDonnell & Miller McDonnell & Miller general purpose flow switch, 1 inch replaces fs4-3, McDonnell & Miller, McDonnell & Miller McDonnell & Miller general purpose flow switch, 1 inch replaces fs4-3. Made in United States. Manufactured by McDonnell Miller.


Joe E
2025-09-04 12:16:45
Came as reviewed
Kelly Smith
2024-12-18 12:37:25
If I could give it zero stars I would. I have to change this out every one to two months, when the older models would last for years.
Recommended Products
100879 Flow Switch with Pilot Feature, 12 GPM Flow, Max Switching Voltage 250VAC for General Pump

$105.00

$ 46 .99 $46.99

4.5
Select Option
Square D by Schneider Electric 9036DG2 Commercial Open Tank Float Switch, Nema 1, Contacts Close On Rise, 3-1/2' , Black

$52.61

$ 24 .99 $24.99

4.9
Select Option
Harwil Corporation Flow Switch Q12Ds for 3-4 to 1-1-2in. Q12DS501.54SNO1 Q12DS501.54SNO1

$71.35

$ 29 .99 $29.99

4.4
Select Option
DIGITEN FS-C01 G1/2' BSP Male Thread Brass Water Flow Switch with Filter 1-30L/min, 0-2A/ 0-220V(AC or DC)

$14.99

$ 7 .99 $7.99

4.4
Select Option
Mcdonnell & Miller, FS8-W, Flow Switch, 1 in Nema

$219.25

$ 91 .99 $91.99

4.4
Select Option
Mcdonnell & Miller 3/4 FNPT Heavy-duty, High Sensitivity Flow Switch, FS6-3/4

$585.31

$ 99 .00 $99.00

4.4
Select Option
Flow Switch, Grid Controls 1' with Two Cords, M310 10A Flow Switch, Chemical dosing Control, for Pump-57-F4-3100-112

$149.00

$ 73 .99 $73.99

4.7
Select Option
WALFRONT HT-30 AC 0-110V 0.2A G3/4 '-3/4' Thread Sensor Switch Pump Water Sensor Switch

$15.70

$ 6 .99 $6.99

4.8
Select Option