Abstract: A filling loop device is provided to facilitate filling of an installed pressurised heating circuit (2) including a boiler (furnace) (1) from a mains supply pipe (3). The device includes a dead-man valve (14) configured to normally close off a water channel provided by a hose (16). This ensures that the channel can only be opened when attended during charging. Conventionally the hose ordinarily used to charge the heating circuit should be removed after isolation valves are closed at the inlet (4) and outlet (6). However careless operatives have been found to have frequently left the hose in place with the isolation valves open causing serious damage to the boiler. A second embodiment of the invention includes a pressure regulation valve (25) in the filling loop device to prevent careless operatives charging the system to excessive pressure. A third embodiment provides a pressure regulation valve in the circuit, normally biased to a closed condition with a dead-man actuator to open the channel.

Abstract: A filling loop device for a pressurized heating system comprising means defining a fluid passage having, an inlet port connectable to a fluid supply and an outlet port connectable to a heating system fluid circuit; and a dead man valve interposed in the passage between the inlet port and the outlet port, said dead man valve biased to a normally closed condition to shut off fluid flow through the channel in either direction when unattended, and manually operable to an open condition to permit fluid to flow from the inlet port to the outlet port. Also provided is a method of charging a pressurized boiler and heating circuit.

Abstract: A filling loop device for a pressurized heating system comprising means defining a fluid passage having, an inlet port connectable to a fluid supply and an outlet port connectable to a heating system fluid circuit; and a dead man valve interposed in the passage between the inlet port and the outlet port, said dead man valve biased to a normally closed condition to shut off fluid flow through the channel in either direction when unattended, and manually operable to an open condition to permit fluid to flow from the inlet port to the outlet port. Also provided is a method of charging a pressurized boiler and heating circuit.