Question about Y-piece

Stoker

Member
Joined
Apr 8, 2017
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8
The description of the y-piece part no 452898 states

"for D 50/D 36/D 27, for connection of two dust extraction hoses, with blanking plug,
for extractors that admit hazardous dust, simultaneous operation is not permitted,"

I'm not sure what is meant by "simultaneous operation is not permitted".

Does it mean that one branch of the Y must always be closed off?

 
From my understanding, yes. Having 2 hoses in use will no doubt half the flow volume to each (providing theybare the same diameter), the certification on collecting hazardous material is based on max flow rate to ensure none od the nasties escape.
 
Stoker said:
The description of the y-piece part no 452898 states

"for D 50/D 36/D 27, for connection of two dust extraction hoses, with blanking plug,
for extractors that admit hazardous dust, simultaneous operation is not permitted,"

I'm not sure what is meant by "simultaneous operation is not permitted".

Does it mean that one branch of the Y must always be closed off?

You would not have to have one branch always closed off.  You would only need to close one off when you are capturing "hazardous dust" on the other branch.  Normal woodworking operations shouldn't be an issue unless one is working with items containing lead based paint, or picking up dust of a similar type from surfaces.
 
LooseSox and thudchkr

Many thanks for your replies.

If I was using it on a router table where I wanted dust extraction both above and below then I could probably get away with using both branches.

But if I was cutting something that would create hazardous dust then it is best not to split the airflow.
 
Stoker said:
...
If I was using it on a router table where I wanted dust extraction both above and below then I could probably get away with using both branches.

But if I was cutting something that would create hazardous dust then it is best not to split the airflow.

I use two hoses on the Y connector when I can with my 2200 router - virtually no dust gets out.  If I were to route some toxic wood like yew or oleander, I would probably still use both hoses together on the router since the two hoses do better a collecting the dust than just using one.

As an aside, I don't even know where to get a large enough piece of oleander to work, or why I would want it.

I suspect the warning is more geared toward lead paint and asbestos with sanders, but as a non-professional in dealing with hazardous material, I wouldn't go after those even with just one hose.
 
I think dust collection using two hoses for two different tools is not a good idea.  I tried it with one hose dedicated to the Kapex and one to my RO150.  A lot of dust escaped the Kapex and I quickly abandoned the idea.  Two hoses for two sanders might work, although I’ve not tried it.  I think that any tool which has near zero restriction on it will defeat a two hose system.
 
Stoker said:
"for D 50/D 36/D 27, for connection of two dust extraction hoses, with blanking plug,
for extractors that admit hazardous dust, simultaneous operation is not permitted,"
If someone mentioned "hazardous dust" to me, my first thought would be RRP. Lead containment from paint. Festool vacs are approved for RRP work. :)https://www.epa.gov/lead/renovation-repair-and-painting-program

Splitting off the hoses is most commonly used for routers mounted in a table.
 
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