blocked drains walthamstow


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If that doesn’t seem to be the issue

If that doesn’t seem to be the issue, next, find the schrader valve on the expansion vessel (it looks like an air valve found on a car or bike tire) unscrew the plastic cover on top of the schrader valve and briefly press the pin in on the valve if air doesn’t come out and water comes out of the valve instead, the expansion vessel is bad the diaphragm inside the vessel is ruptured and the vessel needs to be replaced. People generally find that swapping.

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