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Partial PVC under slab dust collection7/10
I am building a new building and I want to run pvc across the building in the slab so that it is not over head. Does anyone have any problems with that? The whole dust collection system won't be in the slab, just the ones farthest away and across the building?
Tried that when i built my first building (30 years ago),regretted it after about 6 months. Would not recommend,it limits your tool placement. provides a possible weak point in the slab etc............ If you need to move a tool , overhead can be changed quickly. My experience was not good.capped off the in slab and finished with metal overhead.
Put mine in new building about 20 years ago.
The only way I think this is an even remotely good idea is if you run channels in the slab that have steel or wood removable caps. Multiple channels down the length of the shop perhaps 10' apart. Dust pipes would be in the channels and could be brought up through the cap where needed. When a machine is relocated the cap could be repaired. When a clog happens the pipe is accessible.
Machines would have to then be in rows so the dust outputs would be over a channel with the dust collection pipes. Perhaps workable, perhaps not.
I agree with the others......in the floor sounds like a good idea but overhead is best.
Did that about 25 years ago. Worked for awhile, then added tools, moved tools etc. Also it's not easy to unplug. My use was long term compared to others here, maybe 18 months. It is easy to change overhead ducting. If you use the duct that has flanges held together by rings it is really easy. Actually not all that hard with regular spiral.
PVC is frowned on by most codes and insurance companies. You can get spiral duct made for under ground work. Check with heating shops.