Does an external condensate pipe have to be insulated?
Yes. External condensate runs must be kept to a maximum of 3 metres and must be insulated.
It may also be advisable to increase the pipe diameter larger than the diameter stated within the installation manual.
If pipework is not sufficiently sized and insulated, freezing of the condensate may occur. If this happens, your boiler would display a fault code which could be any of the following, depending on your boiler: ‘EA’ fault code, ‘D5’ fault code, a blue slow flashing light, a blue slow flashing light that remains off longer than it flashes on.
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