4-way 21s4 de la bobine de la vanne De Dietrich 7655261

This 4-way valve coil 21s4 is a critical replacement part for heating systems, providing the electromagnetic actuation needed to switch the valve position. It ensures proper flow direction in hydronic systems, supporting efficient heat distribution. As a durable component in burner spare parts, it helps maintain consistent operation and extends the life of your valve assembly.