Hot Tub & Spa - Flow Switches

In this section you will find our range of flow switches for your hot tub or spa, from brands such as HydroAir and Harwil.

Need help? Ask us a question

In this section you will find our range of flow switches for your hot tub or spa, from brands such as HydroAir and Harwil.

Need help? Ask us a question

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Spares Available
Spares Available
  • Harwil Switch Only
  • 1/2" NPT Connection SPST
  • 1/2 AMP
  • Immersed Length from Bottom of Nut : 2-5/16"
In stock 3 in stock
In stock Same day dispatch on orders before 15:00
£64.99
Saving: £18.28
1/2" NPT Connection SPST
10 AMP
Flow: 10 GPM
Length: 2-5/16"
  • Harwil Flow Switch
  • 3/4" Rib Barb
  • Tee Style 
  • Clear Plastic
In stock 5 in stock
In stock Same day dispatch on orders before 15:00
£71.66
Saving: £10.54
1/2" NPT
3/4 Rib Barb Tee Style
Clear Plastic
  • Harwil Flow Switch
  • Drain Down Tee
  • 3/4"x 3/8" Barbed
In stock 8 in stock
In stock Same day dispatch on orders before 15:00
£58.74
Saving: £11.14
1/2" NPT
3/4"x 3/8" Barbed
Drain Down Tee
Clear Plastic
  • Harwil Flow Switch no Cables
  • 3/4" Fitting
  • Tee Style
  • Standard Immersion
In stock 1 in stock
In stock Same day dispatch on orders before 15:00
£61.24
Saving: £11.63
1/2" NPT
3/4" Tee Style
Spade Terminals
  • Harwil  Flow Switch Tee
  • In-Ground Assembly
  • 2.0" x 2.0" x 1/2"
  • 5m Cable

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Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
Available for Pre Order 4 more on order
£77.08
Saving: £24.97
1/2" NPT
In-Ground Assembly
2.0" x 2.0" Tee Style
5m Cable
  • Certikin Flow Switch
  • 25 AMP
  • White
  • PVC Plastic
Available for Pre Order Special Order Item
Alert Please contact us for a lead time
£180.00
Saving: £52.50
  • FLOW SWITCH: 
  • 1-1/2" PVC Slip  Connection
  • MPN: 40017-400
In stock 2 in stock
In stock Same day dispatch on orders before 15:00
£77.08
Saving: £18.87
  • Gecko Flow Switch Cable
  • P/N: 9920-400997
  • Length: 15cm (6")
  • Suitable for S-CLASS & M-CLASS
In stock 1 in stock
In stock Same day dispatch on orders before 15:00
£13.33
Saving: £3.12
  • Harwil Fluid flow Switch
  • 8 to 1900 GPM & up
  • for pipes 1" -10" & up
Available for Pre Order Special Order Item
Alert Please contact us for a lead time
£365.41
Saving: £141.73
  • Gecko Pressure/Flow Switch
  • Cable Only
  • 180CM Length
  • Model: 9920-400124
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£16.24
Saving: £1.70
  • HydroAir Compression Nut
  • Suitable for Thermonsensor
  • Fits Thermo Sensor 20-0502
  • Use with Reducing Tees with 1/2" Tee
Available for Pre Order Special Order Item
Alert Please contact us for a lead time
£2.08
 
  • Spa-Quip O-Ring
  • 13mm O/D x 2mm Thickness
  • Suitable for Spa-Quip Optical Water Sensor
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£0.83
 
  • Spa-Quip / Davey Sensor
  • Detects Water through Heater
  • Suitable for Spa-Quip / Davey Packs
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£26.66
Saving: £7.74