Suprima heat exchanger swap & derust?

Discussion in 'Plumbing and Central Heating' started by Liverpool-Lad, 3 May 2021.

  1. Liverpool-Lad

    Liverpool-Lad

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    Hi folks

    I've acquired a new cast heat exchanger to replace the existing one on our suprima boiler. It has slight surface rust inside, would be it worth filling the inside with a rust neutraliser/dip to clear any off before fitting, or is this a waste of time? If so what product should I look into?

    Any gotchas on this job or other parts we will need? I have new rubber washers, maybe the 30mm nuts too? I will be getting a gas safe engineer in to do this job.

    Many thanks.
     
  2. spareshunter

    spareshunter

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    I think the RGI will advise that you get a new boiler. This one was notorious at PCB breakdown and never really resolved 100% despite many "improvements". Not worth the agro.
     
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  4. Liverpool-Lad

    Liverpool-Lad

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    The boiler has had a replacement pcb/loom in the past and functions ok. I am getting some kettling so suspect the heat exchanger, hence the swap.

    Not intending to replace it if possible!
     
  5. spareshunter

    spareshunter

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    For now.

    Cast iron Boilers kettles for a reason. Calchem or boiler silencer may fix it for a short period. Would not replace hex, waste of time.
     
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  7. Liverpool-Lad

    Liverpool-Lad

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    I have tried a few additives and it returns, Im happy to replace the exchanger to try it out.
     
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    DIYnot Local

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