Flow switches

An essential safety feature of a spa heater, the flow switch 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 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
 85,00€ 
In stock
Harwil Q-12DS-C2 in a tee
Harwil Q-12DS-C2 in a tee
 85,00€ 
In stock
Harwil flow switch for Astrel heaters
Harwil flow switch for Astrel heaters
 110,00€ 
COVID-19: lead time uncertain
Harwil 1/2" flow switch
1/2" Flow switch
 72,00€ 
In stock
Elecro Optima flow switch
Elecro flow switch
 109,50€ 
COVID-19: lead time uncertain
Harwil 1A flow switch - 1/2" thread for 3/4" tee
Harwil 1A flow switch
 72,00€ 
In stock