Morning All,
Long time lurker, first time poster - Hello
It has become time to flush my radiators, on account of them having patchy heating. Being of cheap nature, I'm going avoid paying someone else to powerflush them and see how badly I can mess things up myself. I have a decent amount of DIY plumbing experience (that's not to say I've been doing it right of course!) but my modern central heating experience is fairly limited - changed the pump, diverter valve, PCB and a few other bits and bobs over time, but not much else.
I have a nine year old external oil fired Worcester Bosch 18/25 combi boiler powering seven radiators and I wish to flush the radiators using the method in this thread: https://www.diynot.com/diy/threads/how-to-flush-a-heating-system-with-mains-water.38902/
I have a couple of questions though - the article says to close the boiler circuit - presumably that would be done with the valve shown in the picture below? (I actually need to replace that valve as it doesn't seem to do anything.)
The next question would be where to drain. I've had engineers round when the boiler went wrong in the past and they both drained from two different points (see picture below), but they couldn't say why they did it from their chosen point and whether it was better than the other drain point - I think the basically used the drain point they saw first. Is there a difference between the two? Why does it have two in fact? Can I use either one?
Many thanks,
Mark
Long time lurker, first time poster - Hello
It has become time to flush my radiators, on account of them having patchy heating. Being of cheap nature, I'm going avoid paying someone else to powerflush them and see how badly I can mess things up myself. I have a decent amount of DIY plumbing experience (that's not to say I've been doing it right of course!) but my modern central heating experience is fairly limited - changed the pump, diverter valve, PCB and a few other bits and bobs over time, but not much else.
I have a nine year old external oil fired Worcester Bosch 18/25 combi boiler powering seven radiators and I wish to flush the radiators using the method in this thread: https://www.diynot.com/diy/threads/how-to-flush-a-heating-system-with-mains-water.38902/
I have a couple of questions though - the article says to close the boiler circuit - presumably that would be done with the valve shown in the picture below? (I actually need to replace that valve as it doesn't seem to do anything.)
The next question would be where to drain. I've had engineers round when the boiler went wrong in the past and they both drained from two different points (see picture below), but they couldn't say why they did it from their chosen point and whether it was better than the other drain point - I think the basically used the drain point they saw first. Is there a difference between the two? Why does it have two in fact? Can I use either one?
Many thanks,
Mark