Draining heating system from magnet filter

Jblakes · 6 Nov 2026

Morning all,

Is it possible to drain the entire system from the magnetic filter pot (the magnet that sits next to the boiler) our boiler is downstairs in the cellar and so the magnetic filter is the lowest point in the system.

Regards
James

Exedon · 6 Nov 2026

If it's lowest point in system no reason why not.

Jblakes · Saturday at 1:18 AM

OK, so what would be the best method to drain from here?

Mottie · Saturday at 6:12 AM

Do you have a picture of the filter? On some filters you can fit a hose connector.

avonmouth · Saturday at 9:06 AM

Mottie said:
Do you have a picture of the filter? On some filters you can fit a hose connector.

I've got a fernox tf1 on my boiler and a 3/4 inch flexi tap connector fits straight on it to make draining/flushing into a bucket easier.

Jblakes · Saturday at 10:26 AM

One of these fitted with the bpiler

One of these fitted with the boiler

Deluks · Saturday at 10:55 AM

Check the rest of your system for drain cocks, there might be parts of the pipework that hold water even after you've drained the filter.

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Draining heating system from magnet filter

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