Drywall sanding produces lots of dust no matter how dust free your joint compound claims to be, Drywall dust will quickly clog your shop vac filter and shorten the life of your vacuum.
There is a wide selection of drywall dust separators on the market from $50 or so on up to several hundred dollars for a nice Festool extractor. Being a DIY homeowner, taping drywall is not a full time job and doesn't warrant spending the money, so I decided to make my own with about $20 at the local hardware store, This price can be more or less depending on how you make it and what items you might have lying around, I could have used an old bucket but opted to buy a new one for this project, about $5 for bucket and lid at Lowes.
Step 1: Shopping List
There are numerous ways to configure this with PVC pipe and hoses. I chose to do this with a combination of threaded and slip PVC fittings for my shop vac that has a 1 1/4" hose.
1 - Bucket and Lid
1 - 1" schedule 40 PVC pipe, cut in several sections: 1 x 12" and 4 x 1 1/2"
4 - 1" PVC female slip to male threaded
1 - 1" PVC threaded coupling
1 - 1" PVC slip to threaded coupling
2 - 1" PVC slip 90 degree elbows
1 - 1" PVC female slip to male threader 90 degree elbow
PVC primer and glue
All purpose PVC glue
Hacksaw to cut PVC pipe
1 1/8" spade bit or hole saw (I used a 1" spade bit and widened the hole with a box cutter)