the valve body must be purchased separately

Flexible Installation: Integrated mounting hardware and a 3-inch stroke length provide compatibility with a wide range of mechanical linkages

this furnace collector box gasket prevents hazardous flue gas and air leakage by securing the interface between the collector box and the heat exchanger

High-Temperature Resistance: Constructed from professional-grade materials capable of withstanding the thermal cycling of modern high-efficiency heat exchangers

It features a fixed 45-second heat-on delay and adjustable fan-off delay settings—configurable to 60

Viessmann 7828749 Flow Sensor 340793-762 the valve body must beThe Viessmann 7828749 Flow Sensor is a critical OEM replacement component engineered for high accuracy liquid measurement in Vitodens series boilers. This sensor is specifically designed for integration into Viessmann B1KA and Viessmann CPK systems, providing the real time feedback required for the control unit to modulate burner output and manage domestic hot water (DHW) priority. By monitoring flow rates with a measuring range typically calibrated