Xylem-McDonnell & Miller 51-2-HD Head Mechanism 135100, 51-2

The Xylem-McDonnell & Miller 51-2-HD Head Mech 135100 is an essential component of hydronic heating systems, particularly for McDonnell & Miller series 51-2 controls. It controls the boiler's water level, regulates its flow, and ensures safe operation. This head mechanism operates by sensing water level changes via a float and transmitting signals to the control unit. When the water level declines, it causes the boiler to replenish, and when it reaches full capacity, it shuts down. This device maintains continuous water pressure and protects against any damage from low water levels. The 51-2-HD Head Mech is renowned for its longevity, dependability, and ease of maintenance. Its durable construction gives durability over time, and its design enables for fast repair without disturbing pipework. Additionally, Overall, the head machine.