Can anyone tell me the actual outside diameter of the flange on the 4"

I used 4" schedule 40 PVC and it fit snugly on the 4" blast gate. I also drilled and screwed two sheet metal screws per blast gate (along with silicon sealer)

Are they both 4" od, or is one size 4"id for dc machine port?

No, They are 3 11/16 id and 3 13/16 + 1/32 od. There is nothing 4" here.

any suggestions on how to attach this to 4" DWV? The pipe is too large for these.

I didn't hook them up to 4inch. I ran 2 3/4 flex and pvc. Btw...it clogs up with saw dust. I drilled a hole on side opposite the slide with a forsner bit to blow it out. I cover the hole with duct tape.

The action on the 4" plastic version is very rough / jerky. Any successful method of smooting the action? Grease?

I found it varies from one gate to another. Applying wax from a candle or similar source, helped but did not fully fix the issue. I just rubbed it on the flat portion that fits in the groove and worked it back and forth. I would be afraid that grease would trap dust. I prefer metal gates.

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POWERTEC 70108 4 Inch Blast Gate for Dust Collector, Dust Collection Fittings

POWERTEC 70108 4 Inch Blast Gate for Dust Collector, Dust Collection Fittings

Product ID: 324137987

Details

Brand
POWERTEC
Colour
Black
Item dimensions L x W x H
16.8 x 16.5 x
Material
Acrylonitrile
Size
4" (1pk)

💨Optimizes airflow control

📏4-inch nominal diameter fit

🛡️Abrasion-resistant ABS plastic

S$37

Duties & taxes included

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Description

💨 Control the flow, own the workspace!

AIRFLOW MASTERY - Manually regulates vacuum flow to maximize dust collection efficiency
EASY INSTALLATION - Simple setup for both professional workshops and home users
PRECISION 4 INCH FIT - Seamlessly connects with 4” ID dust hoses for universal compatibility
VERSATILE COMPATIBILITY - Works with most dust collection systems; Flex Cuff adapter available for 4” OD ports
DURABLE ABS CONSTRUCTION - Built to withstand daily wear from sawdust, woodchips, and debris

The POWERTEC 70108 4 Inch Blast Gate is a premium ABS plastic dust collection accessory designed to regulate airflow in your workshop. With a precise 4-inch nominal diameter, it fits most 4” ID dust hoses and ports, enhancing dust collection efficiency by directing vacuum flow exactly where you need it. Durable and abrasion-resistant, this blast gate withstands daily exposure to sawdust and woodchips, making it an essential upgrade for any serious woodworker or professional workshop aiming for cleaner, safer air.

Specifications

ASIN	B005VRPQ92
Best Sellers Rank	#102,406 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #57 in Shop Dust Collectors
Brand	POWERTEC
Brand Name	POWERTEC
Color	Black
Colour	Black
Connector Type	Coupling
Connector type	Coupling
Country of Publication	China
Customer Reviews	4.5 out of 5 stars 3,049 Reviews
Global Trade Identification Number	00736815003416
Included Components	4-Inch Blast Gate for Vacuum/Dust Collector
Item Dimensions	16.8 x 16.5 x 8.9 centimeters
Item Type Name	POWERTEC 70108 4 Inch Blast Gate for Dust Collector/ Vacuum Fittings
Item Weight	159 g
Item dimensions L x W x H	16.8 x 16.5 x 8.9 centimeters
Manufacturer	POWERTEC
Manufacturer Part Number	70108
Material	Acrylonitrile Butadiene Styrene
Material Type	Acrylonitrile Butadiene Styrene
Model Number	70108
Number of Pieces	1
Set Name	Single
Size	4" (1pk)
UPC	074994519060 736815003416
Unit Count	1 Count

Reviews

J**B

cool

this is a great little blast controller, very cool

7.04.2019

D**S

Muy práctico, de buena calidad, vale lo.que cuesta

24.07.2023

M**S

Excelente justo lo que necesito

30.11.2023

C**O

portão de alumínio

Muito bem feito, funciona bem

3.01.2023

J**T

Powertec blast-gate

My husband needed this product and he is very happy with it and it came very quickly in the post. Thank you Amazon.

14.09.2019

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