On 09/05/2018 04:13, rbowman wrote:
On 05/08/2018 03:43 PM, Jimmy Wilkinson Knife wrote:
It's not so much the water getting out as air (well hydrogen) being
created from rust inside the radiators and blocking the flow of water.
Why can't someone invent a water pump that can cope with an air bubble?

Switch to steam heat; the radiators have air vents.

All water central heating radiators have air vents. If they didn't,
they'd have lots of air inside them.

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Bod