Central Heating Filters

Perhaps stating the obvious, but the filter won't remove anything that's not suspended in the water. If the rads have got sediment in them that has become consolidated, it will need a vigorous flush to shift it, such as a power flush.

OOI, what sort of element do you have in your bathroom rad such that it would fail? Is it a dual supply rad, hot water in the winter from the DHW system but electricity in the summer?

Which will include banging the hell out of it with a soft face hammer and running the flow both ways changing the flow direction back and forth quickly.

The filer will only removes from the water that flows past it. It won't walk round the system looking for piles of debris.

I have one in a 4 year old system (system boiler with hot tank). The first time run, the magnetic filter had a huge amount of crud stuck to it. There was plenty of crud stuck on the first service after a year, The past years there has been hardly anything.

I bought a new WB boiler and it came with a 10 year parts/labour warranty if I had a filter installed and have it serviced every year.

They are installed in the return pipe to the boiler, to prevent large lumps of magnetite (rust), from getting into the boiler and choking up the fine passages in the boiler's heat exchanger.

I didn’t expect it to ‘hunt’ debris but I drained the system in the when it hadn’t really been run much - ie not in the winter - so wondered if the crud settled but, when the system was run often- it got disturbed.

It is towel rail style radiator which is on the CH but also has a 250 or

In our previous house, the previous owner had configured the pipe work with gate valves so you could switch the bathroom rad between the CH and HW heating path. It worked very well.

Yes, and users may well need that warranty! Our WB boiler is very user-hostile in that all controls are there but not easy to read or set. Particularly if other users feel the need to reset things from time to time. A password protected system might help, but basically it's the controls themselves that are obscure. Not recommended.