Which hose adapter reducer should I get that will connect onto a 4" diameter blast gate outlet then onto or in a 2 1/2" diameter port fitting tblesaw?

Not this adapter, unless you went to HD or Lowes and purchased a 4" thin wall PVC straight connector to convert the blast gate to female. Look at WoodRiver 2-1/2" O.D. Hose to 4" O.D. Quick-Connect Dust Collection Fitting, it appears to be more toward what you are looking for, with a female 4" and will do 2.5" or 2.25" hose connections.

Can I use it to reduce a 4" pvc pipe (water pipe) to a 2-1/2" dust collector hose?

you would have to measure the inside and out Dia.of your pipes.and then check what this product dimensions.

Will this connect directly to 4" abs pipe?

No, you will need a 4”coupler.

I have a Jet bandsaw and the dust comes from a 4" outside dim hole I need to cover and to attach it to a 2 1/4 outside dim vac hose. Will this work?

It looks like the small end is 2 1/4 ID and 2 3/8 OD. The larger end is 3 3/4 ID and 3 7/8 OD. These are tape measurements, not calipers

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

70136 4" to 2-1/2" Cone Reducer, Dust Collection Fittings for Dust Collection Hose to Hose Connection

Product ID: 15245457

Details

Brand
POWERTEC
Color
4" to 2-1/2"
Item Length
0.95 Inches
Item Weight
0.2 Pounds
Manufacturer
Southern LLC
Material
Acrylonitrile

🔄4" to 2.5" hose compatibility

⚙️Precision fit dimensions

🛡️Durable ABS plastic build

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 22.35

Duties & taxes included

In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to France.

Secure transaction

Description

🔧 Upgrade your dust collection game—connect smarter, work cleaner!

BUILT TO LAST - Crafted from premium ABS plastic to resist abrasion and ensure long-term durability.
UNIVERSAL VACUUM FIT - Compatible with Shop-Vac, Sears, and most wet/dry vacuums for versatile use.
COMPACT LIGHTWEIGHT - Sleek 4" x 0.5" profile keeps your dust collection setup streamlined without bulk.
SEAMLESS HOSE TRANSITION - Effortlessly connect 4" and 2.5" dust collection hoses for ultimate workshop airflow.
SNUG SECURE CONNECTION - Designed for a tight fit that minimizes leaks—clamps optional but recommended for peace of mind.

The POWERTEC 70136 Cone Reducer is a precision-engineered adapter that steps down from a 4-inch to a 2.5-inch dust collection hose, enabling seamless integration with popular wet/dry vacuums. Made from durable ABS plastic, it offers a snug fit designed to optimize airflow and withstand abrasive workshop dust, making it an essential upgrade for any serious DIYer or professional workshop setup.

Specifications

ASIN	B002DSDSY2
Best Sellers Rank	#21,043 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Vacuum & Dust Collector Replacement Parts #34 in Power Tool Replacement Parts
Brand Name	POWERTEC
Color	4" to 2-1/2" Cone Reducer
Customer Reviews	4.6 4.6 out of 5 stars (6,807)
Global Trade Identification Number	00736815005656
Included Components	4-Inch to 2-1/2 Inch Cone Reducer
Item Dimensions L x W	4"L x 0.5"W
Item Length	0.95 Inches
Item Type Name	POWERTEC 70136 4-Inch Hose to 2-1/2 Inch Hose Cone Reducer
Item Weight	0.2 Pounds
Manufacturer	Southern Technology LLC
Material Type	Acrylonitrile Butadiene Styrene (ABS)
Nominal Wall Thickness	0.125 inches
Outside Diameter	3.97 Inches
UPC	736815005656
Unit Count	1.0 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.