Hi,

I don't know if anyone has seen this in the cpc offer leaflet:
http://cpc.farnell.com/pro-user/bb-a...r/dp/SI1548903

Though for some reason, it doesn't seem to be coming up at the offer
price.

The description says it is for cleaning ash out of stoves. I know they
vacuum a boiler at its service, though I haven't done one myself, so I
wonder whether it would be useful for boilers too? Is the problem that
the ash/soot is so fine it will go in one end of the vacuum and out
the other unless you use a prefilter or have a very expensive vacuum?

I've read here about people making their own prefilters from a bucket,
to use when wall chasing. Is this an off the shelf answer to that
problem?

Hope that helps someone.
Stephen.

On Dec 4, 10:40*am, Stephen wrote:

I've read here about people making their own prefilters from a bucket,
to use when wall chasing. Is this an off the shelf answer to that
problem?

I've done several of these as dust & chip collectors when woodworking.
They're easy to make, effective, and well worth it. If the listed
thing is solidly made, I'd pay £20 for it, otherwise make your own.

You have two technical problems: making dust come out of suspension in
the air, then keeping the dust in the can and not being picked up
afterwards. The second is often harder, especially in a small can. I
wouldn't try making one out of a bucket - find something taller.

The designs come in three flavours: the "drop box" (search the web for
US woodworkers), the parallel cyclone and the conical cyclone (web
again, there are a couple of really good sites out there).

IMHE, rubble and plaster dust can be filtered with a drop box (sharp
rightangle turn and expansion of the airflow as the hose enters the
box). Lightweight sawdust needs a cyclone. Conical cyclones aren't
worth the trouble except as big fixed units, but simple parallel
cyclones certainly are.
http://www.codesmiths.com/shed/workshop/techniques/cyclones/

One useful rubble & chimney sweeeping pre-filter I use a lot is made
from the old case of a dead workshop vacuum. The original side entry
is blocked and new entry & exit, with a central cyclone tube, are
fitted to the old lid.

On 04/12/10 10:40, Stephen wrote:

The description says it is for cleaning ash out of stoves. I know they
vacuum a boiler at its service, though I haven't done one myself, so I
wonder whether it would be useful for boilers too? Is the problem that
the ash/soot is so fine it will go in one end of the vacuum and out
the other unless you use a prefilter or have a very expensive vacuum?

When I vacuum my old, non-condensing, cast-iron boiler, what comes out
is mostly rust and dead wildlife. Nothing that I'd call ash or soot. I
use an ordinary vac and floss it with thick cord.

Cheers,

Colin.

On Dec 4, 11:46*am, Andy Dingley wrote:
On Dec 4, 10:40*am, Stephen wrote:

I've read here about people making their own prefilters from a bucket,
to use when wall chasing. Is this an off the shelf answer to that
problem?

I've done several of these as dust & chip collectors when woodworking.
They're easy to make, effective, and well worth it. If the listed
thing is solidly made, I'd pay £20 for it, otherwise make your own.

You have two technical problems: making dust come out of suspension in
the air, then keeping the dust in the can and not being picked up
afterwards. The second is often harder, especially in a small can. I
wouldn't try making one out of a bucket - find something taller.

The designs come in three flavours: the "drop box" (search the web for
US woodworkers), the parallel cyclone and the conical cyclone (web
again, there are a couple of really good sites out there).

IMHE, rubble and plaster dust can be filtered with a drop box (sharp
rightangle turn and expansion of the airflow as the hose enters the
box). Lightweight sawdust needs a cyclone. Conical cyclones aren't
worth the trouble except as big fixed units, but simple parallel
cyclones certainly are.
http://www.codesmiths.com/shed/workshop/techniques/cyclones/

One useful rubble & *chimney sweeeping pre-filter I use a lot is made
from the old case of a dead workshop vacuum. *The original side entry
is blocked and new entry & exit, with a central cyclone tube, are
fitted to the old lid.

Mind if we put that on the wiki Andy? I'm sure some folk could use it.


NT

On Dec 4, 4:48*pm, John Rumm wrote:
On 04/12/2010 13:13, Tabby wrote:



On Dec 4, 11:46 am, Andy *wrote:
On Dec 4, 10:40 am, *wrote:

I've read here about people making their own prefilters from a bucket,
to use when wall chasing. Is this an off the shelf answer to that
problem?

I've done several of these as dust& *chip collectors when woodworking.
They're easy to make, effective, and well worth it. If the listed
thing is solidly made, I'd pay 20 for it, otherwise make your own.

You have two technical problems: making dust come out of suspension in
the air, then keeping the dust in the can and not being picked up
afterwards. The second is often harder, especially in a small can. I
wouldn't try making one out of a bucket - find something taller.

The designs come in three flavours: the "drop box" (search the web for
US woodworkers), the parallel cyclone and the conical cyclone (web
again, there are a couple of really good sites out there).

IMHE, rubble and plaster dust can be filtered with a drop box (sharp
rightangle turn and expansion of the airflow as the hose enters the
box). Lightweight sawdust needs a cyclone. Conical cyclones aren't
worth the trouble except as big fixed units, but simple parallel
cyclones certainly are.
http://www.codesmiths.com/shed/workshop/techniques/cyclones/

One useful rubble& * *chimney sweeeping pre-filter I use a lot is made
from the old case of a dead workshop vacuum. *The original side entry
is blocked and new entry& *exit, with a central cyclone tube, are
fitted to the old lid.

Mind if we put that on the wiki Andy? I'm sure some folk could use it.

Hows the memory these days? ;-)

You added that and others last time it came up:

http://wiki.diyfaq.org.uk/index.php?...rs#DIY_Cyclone

(might be better in a separate article on dust/chip collection)


thats just a link rather than the content, unless I'm misunderstanding


NT

On Dec 5, 2:39*am, John Rumm wrote:
On 05/12/2010 00:59, Tabby wrote:



On Dec 4, 4:48 pm, John *wrote:
On 04/12/2010 13:13, Tabby wrote:

On Dec 4, 11:46 am, Andy * *wrote:
On Dec 4, 10:40 am, * *wrote:

I've read here about people making their own prefilters from a bucket,
to use when wall chasing. Is this an off the shelf answer to that
problem?

I've done several of these as dust& * *chip collectors when woodworking.
They're easy to make, effective, and well worth it. If the listed
thing is solidly made, I'd pay 20 for it, otherwise make your own.

You have two technical problems: making dust come out of suspension in
the air, then keeping the dust in the can and not being picked up
afterwards. The second is often harder, especially in a small can. I
wouldn't try making one out of a bucket - find something taller.

The designs come in three flavours: the "drop box" (search the web for
US woodworkers), the parallel cyclone and the conical cyclone (web
again, there are a couple of really good sites out there).

IMHE, rubble and plaster dust can be filtered with a drop box (sharp
rightangle turn and expansion of the airflow as the hose enters the
box). Lightweight sawdust needs a cyclone. Conical cyclones aren't
worth the trouble except as big fixed units, but simple parallel
cyclones certainly are.
http://www.codesmiths.com/shed/workshop/techniques/cyclones/

One useful rubble& * * *chimney sweeeping pre-filter I use a lot is made
from the old case of a dead workshop vacuum. *The original side entry
is blocked and new entry& * *exit, with a central cyclone tube, are
fitted to the old lid.

Mind if we put that on the wiki Andy? I'm sure some folk could use it..

Hows the memory these days? ;-)

You added that and others last time it came up:

http://wiki.diyfaq.org.uk/index.php?...rs#DIY_Cyclone

(might be better in a separate article on dust/chip collection)

thats just a link rather than the content, unless I'm misunderstanding

Sorry I thought you were proposing to use the link... my misunderstanding..

A dust collection wiki would seem like a good idea though... perhaps
sections on coping with problematic tools (i.e. Wall chasers, sanders,
planers etc) as well.

Sounds good.

http://wiki.diyfaq.org.uk/index.php?...ust_collection

Your move next.


NT