Thread: 3 x 100mm adaptor

The only ones I have seen are in galv like this
3x100.jpg

These galv fittings are exactly 100 mm so the don't play nicely with PVC pipe and junctions sizes.
!00 mm flexy will just fit over then at a stretch.

Thanks but I think I might pass on the gal version. I thought I had seen them in the past somewhere but if all else fails I will cut up two separate 2 x 100mm and join them back together to get the third pipe but prefer the buy and use it method if I can.

Originally Posted by Chris Parks

Thanks but I think I might pass on the gal version. I thought I had seen them in the past somewhere but if all else fails I will cut up two separate 2 x 100mm and join them back together to get the third pipe . . . .

Trouble with that method is the 3 x 100s are going into a single 100 mm - the 3 x 100 should connect into a 150 mm pipe.

Another method is to use a 150 - 100 mm Y, and add a 3rd 100 mm arm and a 150 -> 100 mm adapter to the 150 inlet.

This is what I have on my belt sander. Problem with this method is it take up a lot of space.

the adapter I am thinking of had 150mm pipe and 100mm entries direct into the 150mm.

Originally Posted by Chris Parks

the adapter I am thinking of had 150mm pipe and 100mm entries direct into the 150mm.

I've never seen 2 x 100 mm into one 150 mm, the common one is 150 straight thru and a 100mm off to the side

The other option is to get two of these and split them in half and glue the sides with the 100 arms together and add a reducer to the middle 150mm outlet.

3x100x.jpg

That is exactly what I intend to do and put a reducer in the middle leg to get it down to 100mm.

Originally Posted by Chris Parks

That is exactly what I intend to do and put a reducer in the middle leg to get it down to 100mm.

Sound like we're on the same wavelength

The 150 to 100 Y's stormwater fittings are relatively cheap - from my supplier they are $13 each and a reducer is $$7.80.

When you cut it, I would cut oversize and sand in down to the centre line, If you split it exactly down the middle and don't allow for the saw kerf when you go to glue the two pieces together there will be a gap.

Hi Chris, this is the one I use for my bandsaw, not a great fit as the adapter i/d is slightly larger than the 150 mm pipe but a stud adhesive bucket with the bottom cut out works a treat, I believe it came with a carbatec kit
SAM_1846.JPG

Chris

I'm not sure about Aussie but in NZ there are a few outfits selling replacement fittings for the DC7/similar. Like this one here:
Inlet Port for FM300S 3hp Dust Collector | Trade Me

This particular one is not great as the 100mm lines are at quite a strong angle relative to the 150mm i.e. air needs to go through a sharp turn. But the one that came with my 3hp dusty is a bit better.

It's easy enough to do and I cut the fittings on a bandsaw so the kerf is not a huge amount. Thanks for the link WNZ but I want it to lay flat on a wall so I might have to make it.

Originally Posted by shedbound

Hi Chris, this is the one I use for my bandsaw, not a great fit as the adapter i/d is slightly larger than the 150 mm pipe but a stud adhesive bucket with the bottom cut out works a treat, I believe it came with a carbatec kit
SAM_1846.JPG

That looks like the same one as WNZ linked to. Thanks for taking the pic and posting.

Chris

I think the fitting you're looking for is called a Double wye

Originally Posted by WoodyNZ

This particular one is not great as the 100mm lines are at quite a strong angle relative to the 150mm i.e. air needs to go through a sharp turn. But the one that came with my 3hp dusty is a bit better.

That's right, just about all those adapters used to connect multiple 100 mm ducts on DCs are like this and the air streams really do fight each other for entry into the air stream. Worst still is the combination is happening way too close to the impeller or entry way into a cyclone. It would be much better if the combination of air stream's was happening 5 or 10 ducting diameters further back.

The commercial multiple adapters are also not true 100mm ports (more like 95mm) because the ducting fits over the top of the adapters. Female 100mm PVC fittings are 110mm so the ducting (including flexy) fits inside the fitting is a better option to maintain max flow.

In most cases Y's are used in "either - or" flow situations so it does not matter so much.
Where 3 x 100 mm ducts are used to connect to a machine "at the same time" it's better to use a two 150 mm connector in series so the air streams are combining within the bigger volume and are not fighting each other so

As far a double Y's go I have seen 100 (or 110) mm double Y's but never see a 150 mm Y in Australia. I haven't checked the Web throughly so they could be around.

Originally Posted by ian

Chris

I think the fitting you're looking for is called a Double wye

Thanks Ian, now off to the plumbing store to see if they supply it with a 150mm main line as that one looks like it is 100mm but my hopes aren't high I must say.