Glow Worm boiler question?

7 Dec 2020
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United Kingdom
Is anybody on here familiar with the Glow Worm boilers? The pump connection does not seem to have a neutral connection at the boiler. Is this standard?
Does it pick it up elsewhere?


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It's quite common to see and not specific to a Glow Worm boiler. It comes down to the method chosen by whoever wired the system up. You don't give the model or type of boiler and there are many variants, so I'm guessing yours is a 'heat only' boiler and it has a connected hot water cylinder.

In which case, the live is the important pump connection as it is switched 'on' and 'off' by the boiler. And as you suspect, the Neutral can be picked up from another convenient point. So for example, if the pump is located near the motorised valve/s the same neutral can be used for both. Meaning there's no need to run a second neutral wire when there's one associated with the heating system already conveniently there.

If the pump is working it will have a neutral connection.
Last edited:
Thanks. Its an Easicom 3, 25r model.
You are spot on the valves are next to the boiler, which is in the airing cupboard with the hot water tank.
Anyway, thats that mystery over :0

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