CH Inhibitor Fernox MB1 or F1 (or screwfix)

[Jim]

Hi,

I have a open pumped CH/Gravity HW system. I need to refill with inhibitor,
but am confused if which I should use.

Fernox produce MB1 and F1 but it is not clear what the
advantages/disadvantages of each are? Alternativly I have looked at Screwfix
No Nonsense range.

The house is a 4 bed, with 11 rads. How much inhibitor should I be using? I
am guess at 1 bottle of MB1/F2, or using 2 for screwfix.

What is the consensus on which inhibitor to use here?

[TheScullster]

"Jim" wrote

Fernox - no question.
Likely 1 bottle is OK.
Check with their excellent support for true dosage, recommended product etc.
The other rated inhitor is Sentinel but I have found better results with
Fernox.
No commercial interest, just satisfied customer (along with many other
members of this group)

Phil

[Jim]

> Fernox - no question.
> Likely 1 bottle is OK.
> Check with their excellent support for true dosage, recommended product
> etc.

Is the MB1 or F1?

[John]

"Jim" <j...@hotmail.com> wrote in message
news:WXJoj.55172$Kt4....@fe3.news.blueyonder.co.uk...

Check the specs - I think F1 has antifreeze.

[Andy Champ]

The specs are near-as-darnit identical (MB-1 quotes the pH of the
solution not just the concentrate, and there are some other trivial
changes). And the link "Download safety data sheets" gets you to "Email
ad...@fernox.com to request copies of safety data sheets for all of our
chemical products".

Andy

[Dave]

Andy Champ wrote:

On this subject of central heating, how long can I leave cleaner in my
system?

Dave

[Andy Champ]

A HAH! a little rummage gets me a safety data sheet.

MB-1 contains 1-5% triethanolamine
(so 40-200 ml active ingredient per bottle)

F1 contains:
triethanolamine 20-30%
boric acid 15-20%
2,2'-iminodiethanol 1-5%
1h-benzotriazole 1-5%
molybdenum trioxide 1-5%
(which is 100-150ml triethanolamine per bottle, plus the other stuff,
for about the same price...)

Andy

[Andy Hall]

That's Alphi 11