We have been using the Portor Cable vacuums for about 15 years as a drywall company. We started with the previous model 7810. The new 7812 is a vast improvement over the old one, excluding the bags. The old bags you could empty and reuse until they were wore out maybe 5 times. The glue to hold them together held well. The 7812 bags are glued with extremely weak glue. If you're not careful when installing them the flange will separate. The seam on the back of the bag often blows out while vacuuming. Even with extreme care dumping the bags is next to impossible without ruining the bag. I believe the new bags were engineered so you could not reuse them and they succeeded.Get more detail about Porter-Cable 78121 Dry Filter Bags for 7812 Power Tool Triggered Vacuum (3-Pack).
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