The Honeywell automatic filling device is an essential accessory for central heating systems. It is designed to facilitate water filling in a heating system, maintaining the pressure at desired levels. In this way, it helps balance pressure drops that may occur due to air venting through the air release valves.

This mechanism is usually installed at the system inlet, between two switches, so it can be easily removed without draining the installation. Its compatibility with boilers makes it ideal for ensuring the proper operation of the heating system.