How to Drain Water From a Heating System
Hot water heating systems use a boiler to heat water and distribute it to the areas of the system where it is required. Once water has been heated, it is pumped through the radiators. This water typically can be used for heat and for supplying sinks, showers and washing machines with hot water. When the water has been circulated and cools, it returns to the boiler to be reheated and redistributed. Water should be periodically drained from the heating system in order to clean radiators or when replacing radiators or boiler. The system should be cleaned and inspected yearly to keep the system running properly and most efficiently. Does this Spark an idea?
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Instructions
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Turn off the boiler system. Do not forget to also turn off any gas or electricity that supplies the boiler.
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Place a 2-by-4-inch piece of wood across the tank closing the ballcock valve. This will prevent any more water from draining into the boiler when the water reaches a low level.
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Attach the hose to the outlet of the radiator. Feed the end of the hose outside to drain. You may also drain into a bucket, but this can be time consuming and more labor intensive.
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Drain the water completely to clean or replace radiators or boiler.
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Open the valves to the radiators to remove air from the lines, starting with the uppermost floor of the home and working your way down to the lowest floor.
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Monitor the pressure gauge on the hot water heating system between yearly inspections and cleaning. The ideal pressure for most heating systems is between 12 and 15 psi. If the pressure rises above this point, it may be time to call in a professional.
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