DIY radiator circuit flush

FreeBear

coffeehound said: So does that mean the extra gunk isn't magnetic?

If you are in a hard water area, then there will be some limescale. How much of this will be floating around in the system is anyone's guess..

coffeehound

^ I suppose that's a possible downside to flushing -- it's introducing a whole new load of fully hard water, whereas the previous lot will have already dumped its limescale in the circuit somewhere.  Still, got to be done.

Jeepers_Creepers said:

I suspect it's just that some of the particles are so small and fast moving (pumped constantly around the system) that the magnets simply cannot catch them. But I've no idea.

Ideally, with any 'flush', it does end with that - a 'flush'. Ie, system drained down completely after the chemicals and filter have done their thing, refilled, run for a good hour, and drained again. 

Yes you'd hope the flow is enough to take the fine particules out at the drain point?

Jeepers_Creepers

coffeehound said:

Yes you'd hope the flow is enough to take the fine particules out at the drain point?

If they are in suspension at the time, then - yes - they should get flushed out.