My old shop was small and I used 4” PVC. PVC is ok but it has its disadvantages. My concerns for using it in this project were its weight, and the static electricity that builds up in it especially around my sanders. On the other hand the furnace pipe has its disadvantages as well. I found that after installing it, the larger 6” pipe flexes a little when some of the blast gates are closed. The amount of vacuum that this machine creates is massive but I don’t believe it will completely collapse the pipe. It just bothers me to see that for some reason.
The most important part of installing duct work is to sweet talk your son into doing it for you. I used the I’m an old man approach. Lean forward with your hand on your back and moan and groan a little. works well. It also helps if he does it for a living. The material is cheaper and he will know what hes doing.
The next step of the installation requires a fishing pole and some wax worms. Crappies and walleyes need to be caught. Plan on spending the whole day working on this. In the evening your finished. You can sit back and admire those shiny pipes hangin from the ceiling.
All the pipe are suspended from the ceiling. We started with 5ft of 7” to get us up there then reduced it to 6”. All reductions in pipe size are a loss in vacuum. 7” was just too big for the height of the ceiling (10 ft). I needed to keep it above the lights. T’s were used instead of Y’s were the pipes slit off in different directions. This too is a reduction in air flow. Y’s just weren’t available. I mention this because for those who are looking to run pipe with a smaller Dust collector need to take these things in to consideration to get the maximum air flow possible. It would be well worth going the extra mile to find Y’s for your splits. And were the pipe turns down to their ends they are reduced to 4”. All the connections were sealed with a paste made for sealing duct work.
The common metal blast gates that most places carry fit perfectly in the 4” pipe. The dust collector provides enough vacuum to all the ports at the same time eliminating the need to open and close them. How lucky can a guy get.
Well, no more rolling a dust collector around the shop for me . just need to plug some hoses into my tools and get to work.