While fitting a new radiator at friends house disovered there is
only one tank. So obviously any inhibitor added to the system could be
drawn off bit by bit via expansion into the hot water cylnder.Should
I either leave the system un-dosed (as it always has been) fit a
separate expansion tank ,theres easy access and plenty of room. Bearing
in mind the crud in most headers its unlikely anyone would drink from a
hot tap...but I think a mixer of crud and inhibitor would be Very
bad thing indeed. Ta, everyone

wrote:
While fitting a new radiator at friends house disovered there is
only one tank. So obviously any inhibitor added to the system could be
drawn off bit by bit via expansion into the hot water cylnder.Should
I either leave the system un-dosed (as it always has been) fit a
separate expansion tank ,theres easy access and plenty of room. Bearing
in mind the crud in most headers its unlikely anyone would drink from a
hot tap...but I think a mixer of crud and inhibitor would be Very
bad thing indeed. Ta, everyone

There should be absolutely no connection between the CH and
the other side of things. Are you sure of your facts?

Chris Bacon wrote:
wrote:
While fitting a new radiator at friends house disovered there is
only one tank. So obviously any inhibitor added to the system could be
drawn off bit by bit via expansion into the hot water cylnder.Should
I either leave the system un-dosed (as it always has been) fit a
separate expansion tank ,theres easy access and plenty of room. Bearing
in mind the crud in most headers its unlikely anyone would drink from a
hot tap...but I think a mixer of crud and inhibitor would be Very
bad thing indeed. Ta, everyone

There should be absolutely no connection between the CH and

the other side of things. Are you sure of your facts?
Certain, never seen a set up like this. Another curio is the
vent pipe from the boiler is only 15 mm.

On 21 Jun 2006 14:23:14 -0700, wrote:


Chris Bacon wrote:
wrote:
While fitting a new radiator at friends house disovered there is
only one tank. So obviously any inhibitor added to the system could be
drawn off bit by bit via expansion into the hot water cylnder.Should
I either leave the system un-dosed (as it always has been) fit a
separate expansion tank ,theres easy access and plenty of room. Bearing
in mind the crud in most headers its unlikely anyone would drink from a
hot tap...but I think a mixer of crud and inhibitor would be Very
bad thing indeed. Ta, everyone

There should be absolutely no connection between the CH and

the other side of things. Are you sure of your facts?
Certain, never seen a set up like this. Another curio is the
vent pipe from the boiler is only 15 mm.

You may have a primatic cylinder, in which case do NOT put any
inhibitor in because it could get into the DHW.

See http://www.purimachos.info/faq.htm#primatic

Mark

wrote in
oups.com:

While fitting a new radiator at friends house disovered there is
only one tank. So obviously any inhibitor added to the system could be
drawn off bit by bit via expansion into the hot water cylnder.Should
I either leave the system un-dosed (as it always has been) fit a
separate expansion tank ,theres easy access and plenty of room. Bearing
in mind the crud in most headers its unlikely anyone would drink from a
hot tap...but I think a mixer of crud and inhibitor would be Very
bad thing indeed. Ta, everyone


Sounds like a Primatic cylinder, where the circulating boiler output is
topped up from the clean water in the tank.

Dosing would be a very bad idea, replacing with a conventional cylinder and
Feed/expansion header prolly would; often though these were used because of
shortage of room, (or parsimony)

mike

On 21 Jun 2006 23:11:53 +0200, The puppetmater of a figment of his
imagination Chris Bacon wrote:

wrote:
| While fitting a new radiator at friends house disovered there is
| only one tank. So obviously any inhibitor added to the system could be
| drawn off bit by bit via expansion into the hot water cylnder.Should
| I either leave the system un-dosed (as it always has been) fit a
| separate expansion tank ,theres easy access and plenty of room. Bearing
| in mind the crud in most headers its unlikely anyone would drink from a
| hot tap...but I think a mixer of crud and inhibitor would be Very
| bad thing indeed. Ta, everyone
|
|There should be absolutely no connection between the CH and
|the other side of things. Are you sure of your facts?

Untrue.

In the old old days people used primatic systems
http://www.rangecylinders.co.uk/prod...tic/index.html which had only
one tank. The link indicates that they are still available and legal. The
HW and CH circuits were kept separate by gravity. But CH water could
?leak? to the HW circuit, so I would not use inhibitor.

--
Dave Fawthrop dave hyphenologist co uk Google Groups is IME the *worst*
method of accessing usenet. GG subscribers would be well advised get a
newsreader, say Agent, and a newsserver, say news.individual.net. These
will allow them: to see only *new* posts, a killfile, and other goodies.

"mike" wrote in message
. 1.4...
wrote in
oups.com:

While fitting a new radiator at friends house disovered there is
only one tank. So obviously any inhibitor added to the system could be
drawn off bit by bit via expansion into the hot water cylnder.Should
I either leave the system un-dosed (as it always has been) fit a
separate expansion tank ,theres easy access and plenty of room. Bearing
in mind the crud in most headers its unlikely anyone would drink from a
hot tap...but I think a mixer of crud and inhibitor would be Very
bad thing indeed. Ta, everyone


Sounds like a Primatic cylinder, where the circulating boiler output is
topped up from the clean water in the tank.

Dosing would be a very bad idea, replacing with a conventional cylinder
and
Feed/expansion header prolly would; often though these were used because
of
shortage of room, (or parsimony)

Primatic cylinders were expensive. Although before poly F&E tanks and they
were zinc coated steel, it may have made some sense in equipment purchase.
It was just quicker to install, probably saving a little on labour, if
anything. I could never see the reason for them once poly F&E tanks came
about, and they are still sold.

Some makers say you can dose the CH, but only directly into a rad and the
inhibitor has to similar to X-100 or the harsher Fernox.

"Dave Fawthrop" wrote in message
...
On 21 Jun 2006 23:11:53 +0200, The puppetmater of a figment of his
imagination Chris Bacon wrote:

wrote:
| While fitting a new radiator at friends house disovered there is
| only one tank. So obviously any inhibitor added to the system could be
| drawn off bit by bit via expansion into the hot water cylnder.Should
| I either leave the system un-dosed (as it always has been) fit a
| separate expansion tank ,theres easy access and plenty of room. Bearing
| in mind the crud in most headers its unlikely anyone would drink from a
| hot tap...but I think a mixer of crud and inhibitor would be Very
| bad thing indeed. Ta, everyone
|
|There should be absolutely no connection between the CH and
|the other side of things. Are you sure of your facts?

Untrue.

In the old old days people used primatic systems
http://www.rangecylinders.co.uk/prod...tic/index.html which had
only
one tank. The link indicates that they are still available and legal.
The
HW and CH circuits were kept separate by gravity.

By two air bubbles, in fact.

But CH water could
?leak? to the HW circuit, so I would not use inhibitor.

--
Dave Fawthrop dave hyphenologist co uk Google Groups is IME the *worst*
method of accessing usenet. GG subscribers would be well advised get a
newsreader, say Agent, and a newsserver, say news.individual.net. These
will allow them: to see only *new* posts, a killfile, and other goodies.

Dave Fawthrop wrote:
Chris Bacon wrote:
wrote:
| While fitting a new radiator at friends house disovered there is
| only one tank. So obviously any inhibitor added to the system could be
| drawn off bit by bit via expansion into the hot water cylnder.Should
| I either leave the system un-dosed (as it always has been) fit a
| separate expansion tank ,theres easy access and plenty of room. Bearing
| in mind the crud in most headers its unlikely anyone would drink from a
| hot tap...but I think a mixer of crud and inhibitor would be Very
| bad thing indeed. Ta, everyone
|
|There should be absolutely no connection between the CH and
|the other side of things. Are you sure of your facts?

Untrue.

In the old old days people used primatic systems
http://www.rangecylinders.co.uk/prod...tic/index.html which had only
one tank. The link indicates that they are still available and legal. The
HW and CH circuits were kept separate by gravity.

Even with a primatic system there should be no connection
between the CH and the other side of things, so you're
wrong - unless you are claiming that mixing of CH water
with the rest is normal.

"Chris Bacon" wrote in message
...
Dave Fawthrop wrote:
Chris Bacon wrote:
wrote:
| While fitting a new radiator at friends house disovered there is
| only one tank. So obviously any inhibitor added to the system could
be
| drawn off bit by bit via expansion into the hot water cylnder.Should
| I either leave the system un-dosed (as it always has been) fit a
| separate expansion tank ,theres easy access and plenty of room.
Bearing
| in mind the crud in most headers its unlikely anyone would drink from
a
| hot tap...but I think a mixer of crud and inhibitor would be Very
| bad thing indeed. Ta, everyone
|
|There should be absolutely no connection between the CH and
|the other side of things. Are you sure of your facts?

Untrue. In the old old days people used primatic systems
http://www.rangecylinders.co.uk/prod...tic/index.html which had
only
one tank. The link indicates that they are still available and legal.
The
HW and CH circuits were kept separate by gravity.

Even with a primatic system there should be no connection
between the CH and the other side of things, so you're
wrong - unless you are claiming that mixing of CH water
with the rest is normal.

He is more right that you that is clear. Only two air bubbles separate the
CH and secondary fresh water.

Doctor Drivel wrote:
"Chris Bacon" wrote ...
Dave Fawthrop wrote:
Chris Bacon wrote:
|There should be absolutely no connection between the CH and
|the other side of things. Are you sure of your facts?

Untrue. In the old old days people used primatic systems

HW and CH circuits were kept separate by gravity.

Even with a primatic system there should be no connection
between the CH and the other side of things, so you're
wrong - unless you are claiming that mixing of CH water
with the rest is normal.

He is more right that you that is clear. Only two air bubbles separate
the CH and secondary fresh water.

The systems keep both water systems separate. I said that. DF said that.
Now you have also said that. Thank you for agreeing with me as well!

"Doctor Drivel" wrote in
reenews.net:


Primatic cylinders were expensive. Although before poly F&E tanks and
they were zinc coated steel, it may have made some sense in equipment
purchase. It was just quicker to install, probably saving a little on
labour, if anything. I could never see the reason for them once poly
F&E tanks came about, and they are still sold.

Some makers say you can dose the CH, but only directly into a rad and
the inhibitor has to similar to X-100 or the harsher Fernox.


That brings back memories - I grew up with a steel squarish one, about
3x3x1ft deep, that fitted neatly under the airing cupboard.

Some time when I was away defending queen and country, it got replaced by a
cylinder that didn't fit in the space.

Prolly some mad scam/scheme by B-I-L and his family; I never enquired about
those things

mike

On 22 Jun 2006 14:02:22 +0200, Chris Bacon wrote:

|Dave Fawthrop wrote:
| Chris Bacon wrote:
| wrote:
| | While fitting a new radiator at friends house disovered there is
| | only one tank. So obviously any inhibitor added to the system could be
| | drawn off bit by bit via expansion into the hot water cylnder.Should
| | I either leave the system un-dosed (as it always has been) fit a
| | separate expansion tank ,theres easy access and plenty of room. Bearing
| | in mind the crud in most headers its unlikely anyone would drink from a
| | hot tap...but I think a mixer of crud and inhibitor would be Very
| | bad thing indeed. Ta, everyone
| |
| |There should be absolutely no connection between the CH and
| |the other side of things. Are you sure of your facts?
|
| Untrue.
|
| In the old old days people used primatic systems
| http://www.rangecylinders.co.uk/prod...tic/index.html which had only
| one tank. The link indicates that they are still available and legal. The
| HW and CH circuits were kept separate by gravity.
|
|Even with a primatic system there should be no connection
|between the CH and the other side of things, so you're
|wrong - unless you are claiming that mixing of CH water
|with the rest is normal.

The operative word is *should*, I would not trust it.
--
Dave Fawthrop dave hyphenologist co uk Google Groups is IME the *worst*
method of accessing usenet. GG subscribers would be well advised get a
newsreader, say Agent, and a newsserver, say news.individual.net. These
will allow them: to see only *new* posts, a killfile, and other goodies.

"mike" wrote in message
. 1.4...
"Doctor Drivel" wrote in
reenews.net:


Primatic cylinders were expensive. Although before poly F&E tanks and
they were zinc coated steel, it may have made some sense in equipment
purchase. It was just quicker to install, probably saving a little on
labour, if anything. I could never see the reason for them once poly
F&E tanks came about, and they are still sold.

Some makers say you can dose the CH, but only directly into a rad and
the inhibitor has to similar to X-100 or the harsher Fernox.

That brings back memories - I grew up
with a steel squarish one, about
3x3x1ft deep, that fitted neatly under
the airing cupboard.

An Elson, still made today.

Some time when I was away defending
queen and country, it got replaced by a
cylinder that didn't fit in the space.

Typical. The local idiot plumber looks at it, can't figure it out, or not
available at the local, plumbers shop and fits a cylinder. Elsons are great.
They are square and save space. They are mainly sell to developers for new
houses.

I have seen this with thermal stores too. In one instance the blending valve
had gone, the whole estate was fitted from new with them. All the idiot
plumber had to do was phone up Range and they would send one overnight for
around £25-35. The loony didn't understand thermal stores. He convinced
the householder to fit a tank in the loft, a cylinder and a power shower
pump at great expense, and athe shower was nowheer near what teh mains gave.
I would have taken the ******* to court. Apparently you can, and will win
in these situations. If he doesn't know what a thermal store is he
shouldn't be trading.

Prolly some mad scam/scheme by B-I-L
and his family; I never enquired about
those things

mike

Doctor Drivel wrote:

"mike" wrote in message
. 1.4...
"Doctor Drivel" wrote in
reenews.net:


Primatic cylinders were expensive. Although before poly F&E tanks and
they were zinc coated steel, it may have made some sense in equipment
purchase. It was just quicker to install, probably saving a little on
labour, if anything. I could never see the reason for them once poly
F&E tanks came about, and they are still sold.

Some makers say you can dose the CH, but only directly into a rad and
the inhibitor has to similar to X-100 or the harsher Fernox.

That brings back memories - I grew up
with a steel squarish one, about
3x3x1ft deep, that fitted neatly under
the airing cupboard.

An Elson, still made today.

Some time when I was away defending
queen and country, it got replaced by a
cylinder that didn't fit in the space.

Typical. The local idiot plumber looks at it, can't figure it out, or
not available at the local, plumbers shop and fits a cylinder. Elsons
are great. They are square and save space. They are mainly sell to
developers for new houses.

I have seen this with thermal stores too. In one instance the blending
valve had gone, the whole estate was fitted from new with them. All the
idiot plumber had to do was phone up Range and they would send one
overnight for around £25-35. The loony didn't understand thermal
stores. He convinced the householder to fit a tank in the loft, a
cylinder and a power shower pump at great expense, and athe shower was
nowheer near what teh mains gave. I would have taken the ******* to
court. Apparently you can, and will win in these situations. If he
doesn't know what a thermal store is he shouldn't be trading.

Better get yourself a good lawyer then.

"Richard Conway" wrote in message
...
Doctor Drivel wrote:

"mike" wrote in message
. 1.4...
"Doctor Drivel" wrote in
reenews.net:


Primatic cylinders were expensive. Although before poly F&E tanks and
they were zinc coated steel, it may have made some sense in equipment
purchase. It was just quicker to install, probably saving a little on
labour, if anything. I could never see the reason for them once poly
F&E tanks came about, and they are still sold.

Some makers say you can dose the CH, but only directly into a rad and
the inhibitor has to similar to X-100 or the harsher Fernox.

That brings back memories - I grew up
with a steel squarish one, about
3x3x1ft deep, that fitted neatly under
the airing cupboard.

An Elson, still made today.

Some time when I was away defending
queen and country, it got replaced by a
cylinder that didn't fit in the space.

Typical. The local idiot plumber looks at it, can't figure it out, or
not available at the local, plumbers shop and fits a cylinder. Elsons are
great. They are square and save space. They are mainly sell to
developers for new houses.

I have seen this with thermal stores too. In one instance the blending
valve had gone, the whole estate was fitted from new with them. All the
idiot plumber had to do was phone up Range and they would send one
overnight for around £25-35. The loony didn't understand thermal stores.
He convinced the householder to fit a tank in the loft, a cylinder and a
power shower pump at great expense, and athe shower was nowhere near what
the mains gave. I would have taken the ******* to court. Apparently you
can, and will win in these situations. If he doesn't know what a thermal
store is he shouldn't be trading.

Better get yourself a good lawyer then.

Russ, where you the cowboy that did it then?

Dave Fawthrop wrote:
Chris Bacon wrote:
|Even with a primatic system there should be no connection
|between the CH and the other side of things

The operative word is *should*, I would not trust it.

AOL. We're sort of disagreeing about wording, I think. I
would get rid of a Primatic system if I could.

On 22 Jun 2006 18:35:22 +0200, Chris Bacon wrote:

|Dave Fawthrop wrote:
| Chris Bacon wrote:
| |Even with a primatic system there should be no connection
| |between the CH and the other side of things
|
| The operative word is *should*, I would not trust it.
|
|AOL. We're sort of disagreeing about wording, I think. I
|would get rid of a Primatic system if I could.

OP said it was not his, so he should advise his friend to replace it.
--
Dave Fawthrop dave hyphenologist co uk Google Groups is IME the *worst*
method of accessing usenet. GG subscribers would be well advised get a
newsreader, say Agent, and a newsserver, say news.individual.net. These
will allow them: to see only *new* posts, a killfile, and other goodies.

On Thu, 22 Jun 2006 16:02:09 +0100, Dave Fawthrop
wrote:

On 22 Jun 2006 14:02:22 +0200, Chris Bacon wrote:

|Dave Fawthrop wrote:
| Chris Bacon wrote:
| wrote:
| | While fitting a new radiator at friends house disovered there is
| | only one tank. So obviously any inhibitor added to the system could be
| | drawn off bit by bit via expansion into the hot water cylnder.Should
| | I either leave the system un-dosed (as it always has been) fit a
| | separate expansion tank ,theres easy access and plenty of room. Bearing
| | in mind the crud in most headers its unlikely anyone would drink from a
| | hot tap...but I think a mixer of crud and inhibitor would be Very
| | bad thing indeed. Ta, everyone
| |
| |There should be absolutely no connection between the CH and
| |the other side of things. Are you sure of your facts?
|
| Untrue.
|
| In the old old days people used primatic systems
| http://www.rangecylinders.co.uk/prod...tic/index.html which had only
| one tank. The link indicates that they are still available and legal. The
| HW and CH circuits were kept separate by gravity.
|
|Even with a primatic system there should be no connection
|between the CH and the other side of things, so you're
|wrong - unless you are claiming that mixing of CH water
|with the rest is normal.

The operative word is *should*, I would not trust it.

The bubble(s) can collapse letting both primary and secondary circuits
mix. I would not trust one either.

Mark

On 22 Jun 2006 18:35:22 +0200, Chris Bacon
wrote:

Dave Fawthrop wrote:
Chris Bacon wrote:
|Even with a primatic system there should be no connection
|between the CH and the other side of things

The operative word is *should*, I would not trust it.

AOL. We're sort of disagreeing about wording, I think. I
would get rid of a Primatic system if I could.

Another drawback of a Primatic cylinder is that you have to use
gravity feed for the HW primary.

Mark