Combination Boiler Straight Filling Loop

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  • This is sometimes known as a combi filling loop
  • Connected to the mains water supply the boiler filling loop is used to "top up" the central heating water pressure following maintenance or in the event of pressure drop
  • A filling loop valve should be disconnected from the boiler when not in use to comply with local water regulations by preventing contaminated water from backflowing into the water mains

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