POWERTEC Shop Vacuum Bags 3PK for Fein 913048K01, 69908195016 Vacuum Bag, Replacement Filter Bags for Fein Turbo III 9-77-25, 9-88-35 Wet/Dry Vac Dust Collection Bags, Shop Vacuum Accessories for Fein

A clean shop vac is a productive shop vac. After a month of steady use with the Powertec 75031 bags on my Fein Turbo III, I’m convinced they’re the simplest way to keep fine dust under control without constantly scrubbing out a drum or clogging a cartridge filter. These are straightforward 2‑ply, high‑efficiency replacement bags built for dry debris—drywall dust, sawdust, cement dust, and cold ashes—and they do exactly that with minimal fuss.

Setup and fit

Installation is a two-step, no-tools process: slide the collar onto the inlet, spread the bag out in the drum, and close the lid. On my Turbo III (9‑77‑25), the collar seated firmly and stayed put through repeated on/off cycles. The cardboard/plastic collar isn’t loose, and I didn’t need to tape it or jiggle it to seal. The bag material has enough body to resist collapsing onto the inlet, which helps maintain airflow early in the fill cycle.

A quick note on use case: these are dry-use bags. Wet pickup and bags don’t mix. If you’re switching between wet and dry tasks, keep a set of bags on hand and plan your sequence to do all dry work first.

Filtration and airflow

The standout here is how well these bags act as a pre-filter. With fine drywall dust and MDF sanding, the internal cartridge filter on my vac stayed noticeably cleaner. Suction held more consistently across the fill window compared to running the vac without a bag. You won’t get HEPA-level capture out of any standard bag unless the vac is HEPA-certified as a system, but for everyday renovation dust and shop debris, these caught the fines that would otherwise cake the pleats and cut airflow.

Cement-board and concrete dust are a tough test for any bag. I ran the bags while scoring and snapping cement board, then vacuuming the fines. Performance was solid: dust stayed in the bag, and the exhaust air looked and smelled clean. If you work around silica, you still need to follow your local safety protocols, but from a house-keeping and machine-protection standpoint, these bags do the job.

Capacity and durability

Capacity is generally the quiet killer of shop-vac bags. Overfill them and you risk a seam failure or an ugly cleanup. I kept these to roughly two-thirds full with fine dust and closer to three-quarters with mixed chips and shavings. Within those limits, the seams held.

I intentionally tried a “worst case” mix—dense grinding dust from concrete plus a handful of small, sharp offcuts—to see how forgiving the material is. Result: no immediate failure, but I could see abrasion marks where sharp corners rode against the bag wall. Moral of the story: if you’re collecting sharp debris (tile shards, screws, metal offcuts), run a quick sweep first, or use the bare drum and filter and switch back to a bag for dust-producing steps. Bags excel at fines; they’re not trash sacks.

As an experiment, I emptied one lightly used bag to see if it could be reused. It’s possible to knock out larger chips and reuse in a pinch, but I wouldn’t make a habit of it with heavy fine dust. The inlet collar and seams are designed for single-use; repeated handling adds stress you won’t see until it’s inconvenient.

Day-to-day usability

• Bag changes are clean. Most of the dust stays in the bag, so you’re not stirring up a cloud while dumping the drum.
• Suction stays predictable. Because the bag spreads the load, you avoid the instant clog you get when a bare drum ingests a burst of fines and cakes the filter.
• The vac smells less “dusty.” Not scientific, but noticeable. A bag captures more of the talc-like fines that carry odors.

One practical tip: avoid aggressive lifts on the hose when the bag is nearing full. Sudden airflow spikes can snap fines loose inside the bag and push against seams. Better to swap the bag earlier than to pay for it with a cleanup later.

Build quality

The 2‑ply media feels more like a fleece/paper hybrid than brittle paper. That gives it a little stretch and a lot more tear resistance. The seams on the bags I used were straight and evenly bonded, and the collar piece was square and well glued. I didn’t see any stray fibers or manufacturing debris inside the bag, which matters when you’re chasing cleanliness.

Compared to the brand-name bags I’ve run in the past, these feel at least as sturdy at the collar. The material does compress down better when the vac is off, so you can keep the bag flatter against the drum and still get the lid to close without fighting trapped air.

Compatibility cautions

These are made for the Fein Turbo III line (specifically 9‑77‑25 and 9‑88‑35). That’s where I’ve used them and where they fit as intended. If you’re hoping to stretch them to other brands or other Fein sizes, don’t count on it. Shop-vac collars vary just enough in diameter and spacing that “close” won’t seal reliably. If you rely on bags to protect a HEPA filter or control exposure, stick to the listed machines.

Value and cost of ownership

Bags add a consumable to your vacuum routine, but they also extend filter life and reduce downtime. With these in place, I spent far less time blasting a caked filter and far less time wiping out a film of dust from the drum. If you account for the price of replacement filters (and your time), the math favors bags for fine-dust work.

Because these come as a 3‑pack, it’s easy to keep one in the vac, one on the shelf, and one as a spare in the truck. I typically burn through a bag per room of drywall sanding or per medium cabinet build (jointing/planing, routing, and sanding), depending on how disciplined I am about emptying stationary tool collectors first.

Best uses

• Drywall sanding and general renovation dust
• Shop woodworking: planing, routing, sanding, and saw cleanup
• Cement board and cement dust pickup after cutting
• Cold ashes from a stove or firebox after they’re truly cold

Avoid wet materials, and think twice about mixed demolition debris with sharp edges. If you have to vacuum up fasteners or tile shards, consider running bagless briefly and then reinstalling a fresh bag for fine dust control.

Tips to get the most out of them

• Don’t overfill. Swap the bag when suction begins to dip or at two-thirds full for fine powders.
• Keep the hose straight when starting. A kink can spike inlet pressure and stress the bag.
• Use the vac’s suction control (if available) when picking up heavy fines; you don’t need max airflow for thin layers of dust.
• Store spares in a sealed tote to keep moisture out; damp bags lose strength and can clump fines.
• Label your vac “DRY ONLY” when a bag is installed so nobody accidentally wets it.

The bottom line

The Powertec 75031 bags do the unglamorous work of keeping fine dust contained, filters clean, and workflow smooth. On the Fein Turbo III they fit, seal, and perform the way a replacement bag should. They’re not indestructible—overfill them, feed them sharp debris, or try to reuse them aggressively, and you’ll find their limits—but used as intended, they provide reliable capture of fine particles and make cleanup a quick bag swap instead of a filter-washing session.

Recommendation: I recommend these bags for Fein Turbo III owners who do regular fine-dust work and want a dependable, cost-conscious consumable that protects filters and keeps dust out of the air. If your use leans heavily toward sharp demolition debris or you need cross-compatibility with other vacs, look elsewhere. For dry shop and renovation dust on the Turbo III, these bags are the practical choice.