T
tomtom1989
Hello does anyone know what this pipe is which diverges from the main pipe after the central heating pump. It seems to connect to the return pipe from the cylinder, so I guess it isn't a bypass?
Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
View the thread, titled "Unknown pipe after pump" which is posted in Central Heating Forum on UK Plumbers Forums.
Bypass not needed with a 3 port so you can close the valve fully
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