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How to use a dust extractor

Updated: 2026-10-21

You have the extractor in the shed, the sander or the saw is already throwing dust, and the drum does not look full. This is how to use a dust extractor so the hose, the bag and the socket limit are checked before you buy another nozzle. The failures in the amazon.co.uk reviews for this set are a hose that does not fit, a bag that is emptied and used again, and a saw that is too hungry for the tool socket. The Products Compared editorial team did not lab-test these machines. A qualifying purchase can earn us a commission at no extra cost to you. Which model belongs in the shed is on the [dust extractor comparison](/hub/workshop/dust-extractor).

You have the extractor in the shed, the sander or the saw is already throwing dust, and the drum does not look full.

Our top picks

Evolution Evolution R15VAC

Best overall

Evolution Evolution R15VAC
6.2/10about £78.00
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Vacmaster Vacmaster Power 30 PTO

Best value

Vacmaster Vacmaster Power 30 PTO
7.4/10about £87.99
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Trend Trend T32

Rank 3

Trend Trend T32
8.2/10about £114.95
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On this page
  1. 1.Connect the hose without tape
  2. 2.Let the socket start the vacuum
  3. 3.Read the filter, not only the drum
  4. 4.Empty it without refilling the room

Connect the hose without tape

Start with the port on the tool, not with a roll of tape. HSE's guidance on on-tool extraction says to use an adaptor and to keep the hood close to the work. Tape leaks, and it lets the hose fall off when the tool moves. On the Evolution R15VAC reviewers put the hose at about 32 mm outside. The Trend T32 includes a dust spout adaptor. Push the adaptor on until it stays put when you tug the hose. If it spins or drops off, it is the wrong size.

Let the socket start the vacuum

Plug the tool into the extractor, plug the extractor into a supply that matches the machine, and pull the trigger. The vacuum should start with the tool and stop when you release it. The Trend T32 does not state a socket. The Vacmaster Power 30 prints 1,490 W. A saw above that figure does not belong in the socket. Evolution reviews put the pass-through near 1,700 W. If the breaker trips, unplug the saw and run the vacuum on its own switch. The T33AL is 110 V. Do not put it on a 13 A house socket to see if it goes.
Evolution Evolution R15VAC

Testsieger

Evolution Evolution R15VAC
6.2/10about £78.00
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Read the filter, not only the drum

Suction falls while the drum still looks empty because the filter or the bag is blocked. On the T32 and the T33AL the clean control is a button. On the T35A the bullets say the filter is vibrated automatically. The airflow LED on the Trend M-class rows is the warning HSE wants you to notice. If it shows the flow has dropped, stop cutting. Use the drain plug on the Vacmaster for a wet job, let the machine dry, and fit the dry filter again before you sand. The T32 listing does not state wet pickup.

Empty it without refilling the room

Switch off, wait until the motor has stopped, and seal a disposable bag. HSE tells you not to empty those bags and use them again. Do not sweep the leftover wood dust, and do not blow it with the Vacmaster's blower. That routine is on the wood dust extractor page. If extraction is the control you rely on at work, COSHH regulation 9 expects a competent person to examine that LEV at least every 14 months. None of these ASINs is for asbestos.

Common questions

How do I connect a saw that the hose does not fit?
Measure the port and fit an adaptor of that size. HSE says adaptor, not tape. On the Evolution, reviewers describe a 1.8 m hose of about 32 mm outside that misses many saw ports. The T32 includes a dust spout adaptor. The KATSU lists five sizes from 31 mm to 85 mm. If the hose still falls off when you tug it, the adaptor is wrong. Tape is the failure mode in those reviews, not the repair.
Can I empty the bag and use it again?
Do not reuse a disposable bag. Seal it and throw it away. HSE's extraction guidance says the same, because emptying the bag puts the dust back in the air. T35A reviews say the paper neck tears if you try. A torn bag is not a saving. It is the cloud you bought the extractor to avoid.
Why has suction dropped while the drum looks empty?
The filter or the bag is blocked before the drum is full. Evolution reviews describe fine sanding dust clogging the cartridge. T32 reviews describe suction falling as the bag fills. Use the clean button where the listing has one, and stop if the Trend airflow LED says the flow is down. Adding another nozzle does not clear a loaded filter.
What does the airflow light mean?
On the Trend T32, T35A and T33AL the listing describes an LED that shows extraction velocity. It is there so you notice when the flow has fallen, which is the low-flow warning HSE expects on an M-class unit. It is not a dust reading for the room. If it warns you, stop the tool and deal with the filter or the bag before you carry on.
What happens if the saw is too powerful for the socket?
The extractor may refuse the tool, trip, or damage the socket. Vacmaster prints 1,490 W. Evolution owners describe a limit near 1,700 W and saws above that which would not run. Unplug the saw from the extractor and do not keep resetting the switch. One Vacmaster review lost the tool socket after a single use. A bigger saw needs a supply that is rated for it, not a longer hose.
Can I use the same machine for water and for fine dust?
You can, and you should not do both in the same session. CITB notes that mixing wet pickup into on-tool extraction can drop the airflow. Empty the water through the Vacmaster drain plug, dry the drum, and refit the dry filter before you sand. The T32 listing does not even state wet pickup. A wet filter loaded with MDF dust is a common way to lose the flow you had in the morning.

Related pages

Best dust extractor

Dust extractor

Dust extractor buying guide: class, volts and socket

M-class dust extractor or shop vac: which one fits

Wood dust extractor: UK limits, class M and a mask

Sources

Public UK sources and the amazon.co.uk listings compared on this page. Updated October 2026.

  1. HSE: Wood dust (retrieved October 2026)
  2. HSE: CIS69 Controlling construction dust with on-tool extraction (retrieved October 2026)
  3. HSE: Cutting and sanding wood (retrieved October 2026)
  4. HSE: WD7 Wood dust (retrieved October 2026)
  5. COSHH regulation 9 (retrieved October 2026)
  6. HSE: Electrical systems in buildings (retrieved October 2026)
  7. Bosch Professional GB: Dust extractors (retrieved October 2026)
  8. Trend UK: T35A 1400 W M-class dust extractor (retrieved October 2026)