How To Repressurise Main Eco Compact Combi Boiler

Learn how to repressurise your Main Eco Compact 25 or 30 kW combi boiler with this step-by-step guide. Keep your boiler running smoothly with this easy tutorial!

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To increase the pressure on a Main Eco Compact 25 or 30 combi boiler, you must open the two valves with blue handles by turning one 90 degrees until fully open.

Then you must open the other valve slowly until the pressure starts rising on the pressure gauge.

Then, close them both fully when you've reached 1 to 1.5 bar on the pressure gauge.


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If your boiler keeps losing pressure, you have a problem with your boiler or heating system that needs to be fixed. Most commonly, it's because of a leak.


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