Installation Notes

First, we want to thank the folks who have helped us with ways to mount our filters on a very wide range of collector configurations.  Hopefully you have already read “narrowing your filter choice” on our site.

Dust Collector Defect?

Some collectors came with the orifice pan welded “below” the air inlet port which causes dust to get sucked out of the dust collection bag.  If you don’t feel like re-positioning it to be “above” the air inlet port; remove it (or at least most of it).


A two part donut system consists of a 20 inch, top platform donut and a  smaller anchor donut.  The filter gasket seals against the platform donut.

First, the anchor donut gets recessed just below the top rim then gets secured to the tub wall with screws.  The platform donut gets firmly screwed to it then gets caulked to the rim from underneath.

Note: Flanged filters such as the C1425C and the 9L series make filter mounting easy but other filters can be adapted.  9L300NANO filters are open at both ends so one end must be capped.

There is an article in Fine Wood Working Magazine which includes the making of donuts. “Soup up you dust collector” April 2013 (NO. 232). You will not have to remove the filter after cleaning it down.

Phil Thien Baffles

Phil Thien (pronounced THEEN), Stumpy Nubs and others have much information on this topic so taking the time to check some of them out is recommended.  If you put a Phil Thien Baffle on the “inside” of your collector you will not be able to secure the filter to the collector with the provided hardware so making the donuts and using a flanged, C1425C or 13F230NANO filter is worthy of serious consideration.

Vortex Cones

Our 35 Series filters get secured to the collector from underneath with the provided latches and the vortex cone is probably in the way.

The bracket holding the bolt which holds the cone does not need to be loosed or removed.

Temporarily, remove the cone from it’s bolt, secure the filter to the collector then replace the cone.

Hole in Orifice Pan to Big?

Check the diameter of the hole in the orifice pan.  Some are more than 15 inches and the filter gasket has no place to seat.  Extend the width of the filter gasket with foam weather stripping or make donuts and use a flanged C1425 filter.


In a hurry to get your upgraded collector up and running?  Using cargo straps or bungee cords does work.  We have no input on duct tape so far.

Delta 50-767 – please contact us at 215-442-9443 or using our contact page .



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