Mike P's post elsewhere reminded me:

Might it be a good idea to drain down our CH system at the moment, and
refill with clean water?

Our boiler is 3 years old, which is when the system was last drained
down. The rest of the system is probably 30 years old (drained at odd
times when events such as boiler replacement have taken place.)

Being a plumbing-o-phobe I like to leave these things *well alone*, but
I wondered if it would be an improvement for next winter (which seems to
be just around the corner BTW).

John

In article
,
Another John wrote:
Might it be a good idea to drain down our CH system at the moment, and
refill with clean water?

Our boiler is 3 years old, which is when the system was last drained
down. The rest of the system is probably 30 years old (drained at odd
times when events such as boiler replacement have taken place.)

Being a plumbing-o-phobe I like to leave these things *well alone*, but
I wondered if it would be an improvement for next winter (which seems to
be just around the corner BTW).

If it's just plain water, then no. Because new introduces air which leads
to corrosion. If it has inhibitor, change it according to the maker's
recommendation.

If no inhibitor, I'd drain, flush through with the appropriate flushing
substance and then add inhibitor.

If that isn't too Irish. ;-)

--
*He's not dead - he's electroencephalographically challenged

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) wrote:
In article
,
Another wrote:
Might it be a good idea to drain down our CH system at the moment, and
refill with clean water?

Our boiler is 3 years old, which is when the system was last drained
down. The rest of the system is probably 30 years old (drained at odd
times when events such as boiler replacement have taken place.)

Being a plumbing-o-phobe I like to leave these things *well alone*, but
I wondered if it would be an improvement for next winter (which seems to
be just around the corner BTW).

If it's just plain water, then no. Because new introduces air which leads
to corrosion. If it has inhibitor, change it according to the maker's
recommendation.

If no inhibitor, I'd drain, flush through with the appropriate flushing
substance and then add inhibitor.

If that isn't too Irish. ;-)

First step would be to clean the strainers and see how much crap they
have collected. If they are pretty clean then it is questionable how
much benefit you will get from draining.
Make sure the inhibitor is within spec though.

Bob

In article ,
Bob Minchin wrote:

Another wrote:

Might it be a good idea to drain down our CH system at the moment, and
refill with clean water?
....
First step would be to clean the strainers and see how much crap they
have collected. ...


"Strainers"? My CH system has strainers?

Thanks for the response, and thanks also to Dave P for his very useful
response earlier.

J.

On Aug 11, 7:57*pm, Another John wrote:
In article ,
*Bob Minchin wrote:



* * Another *wrote:
Might it be a good idea to drain down our CH system at the moment, and
refill with clean water?
...
First step would be to clean the strainers and see how much crap they
have collected. ...

"Strainers"? My CH system has strainers?

Thanks for the response, and thanks also to Dave P for his very useful
response earlier.

J.

If it hasn't and you want to add one, I highly recommend the Fernox
total filter.

http://www.screwfix.com/p/fernox-tf1...questid=708685

In article
,
wrote:
On Aug 11, 7:57 pm, Another John wrote:
In article ,
Bob Minchin wrote:



Another wrote:
Might it be a good idea to drain down our CH system at the moment, and
refill with clean water?
...
First step would be to clean the strainers and see how much crap they
have collected. ...

"Strainers"? My CH system has strainers?

Thanks for the response, and thanks also to Dave P for his very useful
response earlier.

J.

If it hasn't and you want to add one, I highly recommend the Fernox
total filter.

http://www.screwfix.com/p/fernox-tf1...questid=708685


But would there be anything to filter if you use inhibitor and keep it up
to date?

--
*Does fuzzy logic tickle? *

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) wrote:
In article
,
wrote:
On Aug 11, 7:57 pm, Another John wrote:
In article ,
Bob Minchin wrote:



Another wrote:
Might it be a good idea to drain down our CH system at the
moment, and refill with clean water?
...
First step would be to clean the strainers and see how much crap
they have collected. ...

"Strainers"? My CH system has strainers?

Thanks for the response, and thanks also to Dave P for his very
useful response earlier.

J.

If it hasn't and you want to add one, I highly recommend the Fernox
total filter.

http://www.screwfix.com/p/fernox-tf1...questid=708685


But would there be anything to filter if you use inhibitor and keep
it up to date?

Probably bugger all on a sealed system.

Todays job was to change a radiator at my parents holiday appartment and to
add a towel radiator to the bathroom.

My parents bought the place 9 years ago. When I drained down the system 9
years ago the contents of the 4 year old system looked like lemonade. Today
when I drained the system down again the contents looked like lemonade.

I refilled and added inhibitor and I expect there will still be be nothing
to filter in another 9 years.

--
Adam

In article ,
ARWadsworth wrote:
But would there be anything to filter if you use inhibitor and keep
it up to date?

Probably bugger all on a sealed system.

Nor on an open one if the tank is covered and it's not pumping over - or
that's what I found.

Todays job was to change a radiator at my parents holiday appartment and
to add a towel radiator to the bathroom.

My parents bought the place 9 years ago. When I drained down the system
9 years ago the contents of the 4 year old system looked like lemonade.
Today when I drained the system down again the contents looked like
lemonade.

I refilled and added inhibitor and I expect there will still be be
nothing to filter in another 9 years.

Yup. Doesn't sell filters, though. ;-)

--
*No sentence fragments *

Dave Plowman London SW
To e-mail, change noise into sound.

In article , Dave Plowman (News)
writes
In article
,
wrote:
On Aug 11, 7:57 pm, Another John wrote:
In article ,
Bob Minchin wrote:



Another wrote:
Might it be a good idea to drain down our CH system at the moment, and
refill with clean water?
...
First step would be to clean the strainers and see how much crap they
have collected. ...

"Strainers"? My CH system has strainers?

Thanks for the response, and thanks also to Dave P for his very useful
response earlier.

J.

If it hasn't and you want to add one, I highly recommend the Fernox
total filter.

http://www.screwfix.com/p/fernox-tf1...questid=708685


But would there be anything to filter if you use inhibitor and keep it up
to date?

I'm inclined to agree but I did install an 8quid Y-strainer in my system
at outset and it did spot a problem of inhibitor not doing its job and
resulting in circulating crap. That was a useful backup but I doubt the
cost benefit of a more complex product.
--
fred
FIVE TV's superbright logo - not the DOG's, it's ********

On 11 Aug, 23:54, "ARWadsworth"
wrote:
Todays job was to change a radiator at my parents holiday appartment and to
add a towel radiator to the bathroom.

My parents bought the place 9 years ago. When I drained down the system 9
years ago the contents of the 4 year old system looked like lemonade. Today
when I drained the system down again the contents looked like lemonade.

I refilled and added inhibitor and I expect there will still be be nothing
to filter in another 9 years.

--
Adam

Water in my CH has always drained very clear, and has inhibitor, but
when I had a boiler change I had a Magnaclean fitted. I check this
around every six months and there is always black gunge on the filter.

Another John wrote:
In ,
Bob wrote:

Another wrote:

Might it be a good idea to drain down our CH system at the moment, and
refill with clean water?
...
First step would be to clean the strainers and see how much crap they
have collected. ...


"Strainers"? My CH system has strainers?

Thanks for the response, and thanks also to Dave P for his very useful
response earlier.

J.
If the boiler is only 3 years old and properly installed, I'd expect
strainers to be fitted especially as you seem to have used old
rads/pipework with a new boiler.

Bob