Gravity based back boiler CH system - Advice needed.

@Hugh Jaleak - thanks for the feedback. I'm getting schooled in a hurry, appreciated.

At present, apart from the pump failing for the second time in my ownership, and the rads and pump hitting 80C+, there isn't any functional issue with any part of the system.

With that said, I have replaced 3 radiators (+2 of the new ones again within 12 months, another story), the thermostat, the controller, the pump electronics (pump speed selector black box) and most recently the Boiler thermocouple during my ownership of 5 years. So one could argue, it's like trigger's Broom now :LOL: but overall it has been relatively inexpensive to keep going until 2025.

When I replaced 2 radiators last year it showed me that the system needs to be flushed properly and that I should install a Magna clean or equivalent metal catcher sooner than later. With this in mind, I'm tyring to work out what else makes sense to change while the system in fully drained, make a list and prepare for it.

I can do some electrics and have a multimeter, I can and have done basic plumbing, but don't have the tools to handle more complicated stuff like solder piping and cutting and bending the bigger bore pipes. I have other reasons to hand over to a pro at certain times to satisfy the Mrs too, as jobs need to be done quickly and efficiently or I get the stress. Not ideal for my wallet, but I often get reminded "do you want to be right, or do you want to be happy" lol

The air separator part of the system is news to me, as was the CH stat temp, so I'm learning during this process. I will research what I need to replace the aerjec with and add this to the plumber's list of works.

I do appreciate the knowledge and advice.
 

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