--- In [email protected], "ap4098" <brook...@...> wrote:
>
>
>
> --- In [email protected], "Pengalanty" <pengalanty@> wrote:
> >
> >
> > They recommend "Please try to add ## Propylene glycol ## to your system"
> >
> > Can anyone advise please?
> >
> > Is antifreeze with ## Ethylene Glycol ## the same as the above, or does it
> > have the same basic make-up, presumably to stop corrosion of Alloy and
> > Steel components?
>
> No it is not but both have corrosion inhibitors and are available in two and
> five year lives from Motor Factors. It is the corrosion inhibitors that
> probably get "used up". hence the "life". I normally advise a maximum of 50%
> antifreeze although most of the diesel boiler manufacturers say 30%.
>
> It is VITAL to give the system a really thorough flush if you suspect there
> may be any Ethylene Glycol present because it reacts with Propylene Glycol to
> form a jelly like substance.
>
> Tony Brooks
>
Thanks for your wise comments Tony!
My central heating system has Fernox Inhibitor in it.
I propose to drain down and thoroughly flushing the system,
refilling with Fernox again. This does have some Propylene
Glycol in it, (Looked at the spec). ~Allan~
