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A blast gate has one job: close the branches that are not feeding the machine in use, so a small dust collector does not waste airflow across the whole shop. First match the gate to the system’s nominal duct size; the 4-inch products below are for 4-inch dust-collection hose, not shop-vac hose. The second decision is material and mounting. Plastic gates are inexpensive and corrosion-resistant, while metal or aluminium gates suit a more permanent duct run. Keep the slide accessible and clean accumulated sawdust from the track so the gate can close fully.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Oneida 4 in. Aluminum Blast Gate | $20–$35 | Amazon · eBay |
| 2 | Rockler 4 in. Metal Blast Gate | $15–$25 | Amazon · eBay |
| 3 | Rockler Dust Right 4 in. Ready-Mount Blast Gate | $14–$18 | Amazon · eBay |
| 4 | iVac Pro 4 in. Blast Gate | $40–$70 | Amazon · eBay |
| 5 | POWERTEC 4 in. Aluminum Blast Gate | $12–$22 | Amazon · eBay |
| 6 | POWERTEC 4 in. Plastic Blast Gate | $7–$14 | Amazon · eBay |
| 7 | Clear Vue 4 in. Blast Gate | $15–$30 | Amazon |
| 8 | Grizzly 4 in. Blast Gate | $8–$18 | Amazon |
| 9 | WoodRiver 4 in. Blast Gate | $10–$20 | Amazon · eBay |
The picks, in detail
Oneida 4 in. Aluminum Blast Gate
Oneida’s 4-inch aluminium blast gate is the durable choice for a fixed duct branch where a metal slide is preferred. Use it with 4-inch dust hose and a proper clamp rather than forcing it onto a smaller vacuum port.
- Nominal 4-inch dust-collection size
- Aluminium construction
- Oneida dust-collection brand
- Manual sliding-gate design
- Metal construction suits permanent ductwork
- Oneida focuses on dust-collection components
- Costs more than basic plastic gates
- Needs separate mounting and hose clamps
Rockler 4 in. Metal Blast Gate
Rockler’s 4-inch metal blast gate is a conventional manually operated branch control. It is a good fit for a woodworker who wants a metal gate but does not need a proprietary quick-connect system.
- 4-inch nominal port size
- Metal gate construction
- Rockler woodworking accessory
- Manual slide operation
- Simple design works in ordinary 4-inch ducting
- Metal body is more rigid than thin plastic
- Slide track needs occasional cleaning
- Hose and clamps are sold separately
Rockler Dust Right 4 in. Ready-Mount Blast Gate
Rockler’s Dust Right Ready-Mount gate adds an integral wall bracket and a self-cleaning slide. Rockler lists it at $14.99 and specifies 4-inch outside diameters for use with 4-inch inside-diameter hose.
- Rockler item 65837
- $14.99 current Rockler price
- Integral wall-mount bracket
- Self-cleaning high-impact plastic slide
- Bracket eliminates a separate mounting block
- Slide sweeps debris from the track on closing
- For 4-inch hose only
- Plastic is not the choice for a welded steel duct system
iVac Pro 4 in. Blast Gate
The iVac Pro 4-inch blast gate is for a dust system built around iVac automation components. It is the specialist choice when a controller, machine sensor or automated workflow is planned.
- iVac Pro product line
- 4-inch dust-collection connection
- Automation-system ecosystem
- Blast-gate branch control
- Matches an iVac-equipped shop
- Purpose-built for dust-collection routing
- Overkill for a one-machine collector
- Automation components add cost
POWERTEC 4 in. Aluminum Blast Gate
POWERTEC’s 4-inch aluminium blast gate is a value-oriented metal option for a conventional hose run. It suits an upgrade from a loose plastic slide where a sturdier body is wanted.
- POWERTEC 4-inch gate
- Aluminium body
- Manual sliding blade
- Dust-collection accessory
- Aluminium offers a rigid gate body
- Common 4-inch branch size
- Blade can collect fine dust at the edges
- Confirm the port’s actual outside diameter
POWERTEC 4 in. Plastic Blast Gate
POWERTEC’s 4-inch plastic blast gate is the inexpensive choice for a temporary or frequently reconfigured flexible-hose setup. It should be mounted so the slide remains reachable after the hose is attached.
- POWERTEC 4-inch plastic model
- Manual slide gate
- Lightweight polymer body
- Flexible-hose dust-collection use
- Lower-cost way to isolate a branch
- Lightweight for mobile-tool hose runs
- Plastic can flex if overtightened with clamps
- Not suitable for a shop-vac-size hose
Clear Vue 4 in. Blast Gate
Clear Vue’s 4-inch blast gate is aimed at dust systems that benefit from seeing the gate and dust path. It is useful near a difficult-to-reach branch where a visual check helps confirm the slide position.
- Clear Vue dust-collection brand
- 4-inch connection size
- Visible-gate product category
- Manual branch isolation
- Visibility helps identify an accidentally closed branch
- Matches Clear Vue system components
- Clear materials still need dust wiped off
- Requires standard hose clamps and mounting
Grizzly 4 in. Blast Gate
Grizzly’s 4-inch blast gate is a conventional shop-system component from a machinery supplier. It is a straightforward match for a Grizzly collector or any compatible 4-inch flexible duct branch.
- Grizzly dust-collection accessory
- 4-inch nominal connection
- Manual gate mechanism
- Shop-machine supplier product
- Easy to source alongside Grizzly collector parts
- Simple replacement for a worn gate
- Exact construction varies by current SKU
- Check whether hose fits inside or over each port
WoodRiver 4 in. Blast Gate
WoodRiver’s 4-inch blast gate rounds out the list with a woodworking-retail option. It works for a standard branch line when the buyer wants to keep fittings and gates within the WoodRiver/Rockler supply catalogue.
- WoodRiver brand
- 4-inch dust-collection format
- Manual airflow isolation
- Woodworking-shop accessory
- Compatible category for common 4-inch systems
- Easy to compare with other Rockler-sold dust parts
- Not an automatic gate
- Periodic slide-track cleaning is required
Buying tips
- Match a 4-inch gate to 4-inch dust-collection hose, not a 2½-inch shop-vac hose.
- Put the gate close enough to the branch that the slide can be operated without moving a machine.
- Orient the slide so gravity and vibration cannot let it close unexpectedly.
- Use hose clamps or screws appropriate for the duct material.
- Close unused branches before starting the collector to preserve airflow.
- Vacuum or brush sawdust from the slide track when the gate begins to bind.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.