Jargon Buster - O
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The component in a compression fitting that provides the mechanical seal.
Where the radiators are run in series, with the flow in and return out on the same pipe.
Open safety-vent pipe
The part of a conventional tank-fed un-pressurised central heating system that allows any pressure build up to be safely discharged to the atmosphere.
A conventional central heating system which is un-pressurised and tank fed.
A device that collects temperature data from sensors inside and outside the building, allowing the boiler to work at maximum fuel efficiency.
An isolation device to control substances leaving an appliance.
A device fitted to a tank to safely discharge surplus water.