The Glow-worm flow switch acts as a safety device. It is a switch with an in-built sensor that sits in the pipework for both the heating and domestic hot water systems. When the pump is switched on, the flow switches sense this movement and feed the information.
Fits multiple appliances
Technical specification
Waist Sizeab15cd14guTypeMicroswitchSupplier Part NumberS801199Brand NameGlow-Worm