Central heating protection against freezing

[Les]

I have a Mikuni central heating boiler and radiators on my boat and I
am thinking of draining and flushing out the system before winter sets
in.
Question - what do I refill the system with? Should I use ordinary car
engine anti-freeze or is there something better on the market?
tia
Les
nb Frank

[Tony Brooks]

"Les" <eslin...@googlemail.com> wrote in message
news:d6f37b4d-adbf-4568...@f42g2000yqn.googlegroups.com...

It is normally recomended that you use a 30% vehicle antifreeze mixture but
there are acouple of things to watch.

Antifreeze comes in two year and five year lifes. Although more expensive
the 5 year life is probably more cost effective.

There are now two common antifreeze chemicals used and both come with two or
5 year lifes but you must NEVER mix them. If you do they react and form
jelly like stuff. If you intend to change the type it is important to give
the system a very good flush.

I expect you will have the older one in your system and it is usually
coloured blue or green. The new stuff is coloured red/purple/orange.

--
Tony Brooks

www.TB-Training.co.uk
Electrical & Mechanical Training
for ordinary boaters.

[Les]

On Aug 19, 12:15 pm, "Tony Brooks" <T...@tb-training.co.uk> wrote:
> "Les" <eslingfo...@googlemail.com> wrote in message

Tony,
Thanks for the advice. I certainly take note when I get round to doing
the changeover!
Les

[Tony Haynes]

And (with reference to a previous heated thread here) bear in mind
that if there are any potential weak points in the system an
antifreeze mix will find them.

Tone

[Les]

Yes I think antifreeze makes the water "thinner" doesn't it?

[Tony Haynes]

My argument entirely.

Tone