Product code: 498995
A Vaillant brand sensor impeller for the flow switch of ecoMAX VUW (condensing) boilers. The flow switch, or flow meter, has an inbuilt sensor that sits inside heating or hot water system pipework as an important safety mechanism. Designed to sense water flow, the switch feeds information to the boiler's printed circuit board (PCB) to ensure that the burner is not activated when the system is low on water or dry. We carry over 300 of the most in demand parts in-branch and stock over 25,000 spare parts available for next-day timed delivery.