Flow switches

The flow switch is an essential safety feature in a spa heater, and is used to detect the absence or presence of water flow - or even sufficient water flow - into the heater, to prevent overheating.

Here is a selection of flow switches that are compatible with the vast majority of spa heaters on the market today. Please contact us if you can't find the flow switch you are looking for!

Harwil Q-12DS-C2 straight flow switch
Harwil Q-12DS-C2 straight
 99,00€ 
In stock
Harwil Q-12DS-C2 in a tee
Harwil Q-12DS-C2 in a tee
 90,00€ 
In stock
Harwil 35 mm flow switch with 1/2" thread
Harwil 35 mm flow switch
 72,00€ 
In stock
Harwil 46 mm flow switch
Harwil 46 mm
 72,00€ 
In stock
Harwil 46 mm with cable
Harwil 46 mm with cable
 110,00€ 
In stock
Elecro Optima flow switch
Elecro Optima
 109,50€ 
3 weeks