There was also the task of putting a 17metre insulation coil on the plastic water pipe. This pipe is to feed the external tap which will be in the centre of our vegetable garden. It needs to be insulated because it has to travel over the ground source heat pump pipe, and in some places is shallower than 750mm below ground level. This was really difficult and the insulation got very hot in the sun (as it was black) - I think I preferred filling the cavity with LECA!
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