Last edited 28 Jan 2022

Primary pipework

LETI Climate emergency retrofit guide, How existing homes can be adapted to meet UK climate targets, published by LETI in October 2021, defines primary pipework: The pipework between the hot water source (e.g. heat pump) and the hot water tank. This pipework will tend to be of a large diameter and will be used whenever the tank needs to be brought back up to temperature.’

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