Filling the heating system with antifreeze is simple …
Antifreeze is poured into the Glycol Express™ tank. After the drain valve is closed and the service valve is opened, the diaphragm, pushed by household water, forces the antifreeze from the tank into the system. Water that was collected in the tank is drained through the drain valve when more antifreeze is poured into the tank. Putting back antifreeze mixture drained for service is done in the same way. Water can be added into the system with a hose or a by-pass (not shown).
Maintaining the system pressure is automatic …
As some air or antifreeze mixture is expelled from the system through air vents, threaded joints, etc. during normal system operation, the diaphragm, pushed by household water, flexes against antifreeze mixture. This forces the antifreeze mixture from the tank into the system to make up for the lost volume, thus maintaining the pressure in the system set on the Pressure Reducing Valve.
Major water damage to the building is preventative …
In the event of a leak in the heating system, the diaphragm does not allow feeding of household water into the system, thus limiting the leakage to the limited quantity of the antifreeze mixture only.
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