I'm currently flushing out my CH system (as I write, trying to dislodge
airlocks...! :-( ) and hopefully will be in a position to add some new
inhibitor.

I'm wondering how much I need to add, in that I haven't a clue what the
internal volume of my (sealed) system is. I have 15 rads/towel rails of
varying sizes (with mixture of 22/15/10 mm pipework if that makes any
difference) .

Any ideas as to a ballpark figure? As I'm adding Sentinel X100, which
needs 1 bottle per 100 litres, I'm asking should I be adding one bottle
or three?

Thanks
David

On 2006-11-12 17:48:46 +0000, Lobster said:

I'm currently flushing out my CH system (as I write, trying to dislodge
airlocks...! :-( ) and hopefully will be in a position to add some new
inhibitor.

I'm wondering how much I need to add, in that I haven't a clue what the
internal volume of my (sealed) system is. I have 15 rads/towel rails
of varying sizes (with mixture of 22/15/10 mm pipework if that makes any
difference) .

Any ideas as to a ballpark figure? As I'm adding Sentinel X100, which
needs 1 bottle per 100 litres, I'm asking should I be adding one bottle
or three?

Thanks
David

Well.....

You can calculate it:

- Radiator manufacturer web sites have data sheets where you can
normally find the amount of water per section for given heights of
radiator, bearing in mind single or double panel. Multiply by the
number of sections.

- Make a reasonable assumption about pipe lengths. Volume is pi x
diameter x length. You will find that the amount is small in
comparison to radiator volume.

- Add 15 litres or so to account for HW cylinder, boiler and expansion
vessel contents.

OR....

- You will almost certainly find that it's less than or about 100 litres.

OR...

- It won't be more than 200 litres, so you can put in two lots of
jollop and consider that in comparison to replacing all the radiators,
it is very cheap. Overdosing doesn't matter.

"Lobster" wrote in message
...
I'm currently flushing out my CH system (as I write, trying to dislodge
airlocks...! :-( ) and hopefully will be in a position to add some new
inhibitor.

I'm wondering how much I need to add, in that I haven't a clue what the
internal volume of my (sealed) system is. I have 15 rads/towel rails of
varying sizes (with mixture of 22/15/10 mm pipework if that makes any
difference) .

Any ideas as to a ballpark figure? As I'm adding Sentinel X100, which
needs 1 bottle per 100 litres, I'm asking should I be adding one bottle or
three?

Thanks
David

Page 14 of the Quinn price guide gives info for calculating volume of
typical rads:

http://www.quinn-radiators.co.uk/files/priceguide.pdf

In my case I have about 22 linear metres of 520mm standard "round top"
rads..corresponding to about 110 litres.

Plus pipework of course (+10%?)

David

- Make a reasonable assumption about pipe lengths. Volume is pi x
diameter x length.


Tsch!

Volume is Cross-Sectional area * Length.

Area of a circle is pi * r^2, or pi * d^2 / 4

Not pi * d.

So Vol = pi*d^2/4 * L.
( remember to convert units of d and L as appropriate to obtain volume in
whatever units you want. )

From my old maths teacher:

"Write it out 100 times, in ink, for tomorrow.
And at the same time, learn it."

--
Ron

In message , Lobster
writes
I'm currently flushing out my CH system (as I write, trying to dislodge
airlocks...! :-( ) and hopefully will be in a position to add some new
inhibitor.

I'm wondering how much I need to add, in that I haven't a clue what the
internal volume of my (sealed) system is. I have 15 rads/towel rails
of varying sizes (with mixture of 22/15/10 mm pipework if that makes any
difference) .

Any ideas as to a ballpark figure? As I'm adding Sentinel X100, which
needs 1 bottle per 100 litres, I'm asking should I be adding one bottle
or three?

50-100 litres, prolly

basically whatever the volume - one bottle is magically about right

--
geoff

"raden" wrote in message
...
In message , Lobster
writes
I'm currently flushing out my CH system (as I write, trying to dislodge
airlocks...! :-( ) and hopefully will be in a position to add some new
inhibitor.

I'm wondering how much I need to add, in that I haven't a clue what the
internal volume of my (sealed) system is. I have 15 rads/towel rails of
varying sizes (with mixture of 22/15/10 mm pipework if that makes any
difference) .

Any ideas as to a ballpark figure? As I'm adding Sentinel X100, which
needs 1 bottle per 100 litres, I'm asking should I be adding one bottle or
three?

50-100 litres, prolly

basically whatever the volume - one bottle is magically about right

Maxie, 1%. If you over-dose you make perish the rubber parts of the system.

On 2006-11-12 18:44:14 +0000, "Ron Lowe"
said:

- Make a reasonable assumption about pipe lengths. Volume is pi x
diameter x length.


Tsch!

Volume is Cross-Sectional area * Length.

Area of a circle is pi * r^2, or pi * d^2 / 4

Not pi * d.

So Vol = pi*d^2/4 * L.
( remember to convert units of d and L as appropriate to obtain volume
in whatever units you want. )

From my old maths teacher:

"Write it out 100 times, in ink, for tomorrow.
And at the same time, learn it."

Very good. Just checking that people were paying attention......

In message ews.net,
Doctor Drivel writes

"raden" wrote in message
...
In message , Lobster
writes
I'm currently flushing out my CH system (as I write, trying to dislodge
airlocks...! :-( ) and hopefully will be in a position to add some
new inhibitor.

I'm wondering how much I need to add, in that I haven't a clue what the
internal volume of my (sealed) system is. I have 15 rads/towel rails
of varying sizes (with mixture of 22/15/10 mm pipework if that makes any
difference) .

Any ideas as to a ballpark figure? As I'm adding Sentinel X100,
which needs 1 bottle per 100 litres, I'm asking should I be adding
one bottle or three?

50-100 litres, prolly

basically whatever the volume - one bottle is magically about right

Maxie, 1%. If you over-dose you make perish the rubber parts of the
system.

As your father discovered

--
geoff

"raden" wrote in message
...
In message ews.net,
Doctor Drivel writes

"raden" wrote in message
...
In message , Lobster
writes
I'm currently flushing out my CH system (as I write, trying to dislodge
airlocks...! :-( ) and hopefully will be in a position to add some new
inhibitor.

I'm wondering how much I need to add, in that I haven't a clue what the
internal volume of my (sealed) system is. I have 15 rads/towel rails of
varying sizes (with mixture of 22/15/10 mm pipework if that makes any
difference) .

Any ideas as to a ballpark figure? As I'm adding Sentinel X100, which
needs 1 bottle per 100 litres, I'm asking should I be adding one bottle
or three?

50-100 litres, prolly

basically whatever the volume - one bottle is magically about right

Maxie, 1%. If you over-dose you may perish the rubber parts of the
system.

As your father discovered

Good one Maxie. You are a great funnist. Yes you are.