Suprima heat exchanger swap & derust?

L

Liverpool-Lad

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• 3 May 2021

• #1

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.

 

S

spareshunter

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• 3 May 2021

• #2

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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• 3 May 2021

• #3

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!

 

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spareshunter

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• 3 May 2021

• #4

Liverpool-Lad said:

The boiler has had a replacement pcb/loom in the past and functions ok.

Click to expand...

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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• 3 May 2021

• #5

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