Elecro Optima flow switch

This flow switch, from the German brand Sika, ensures that the circulation pump sends sufficient water into the heater to avoid any risk of overheating. It is found on Elecro Optima Compact heaters in particular.

The flow switch has a 24 mm internal thread, which is screwed into a heater tee or union. It is designed for a maximum current of 1A.

Dimensions
Internal thread diameter: 24 mm (3/4" FPT)
Reed length: 50 mm
Total length: 119 mm

Part numbers
Elecro : SP-107-B, PTA10590