We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

FLEXTECH Silicone SAE J20 Heater Hose Reducer, 3 in to 4 in, 3 in Length, Blue - Silicone SAE J20 Heater Hose Reducers
FLEXTECHSilicone SAE J20 Heater Hose Reducers

FLEXTECH Silicone SAE J20 Heater Hose Reducer, 3 in to 4 in, 3 in Length, Blue

The FLEXTECH Hose Reducer (MPN R40-300/400) is a blue silicone SAE J20 heater hose reducer with a 3 in to 4 in hose inside diameter and 3 in hose length. It is constructed from silicone tube and cover materials…

SKU 3G-OTH-457298

Also listed as: R40300400 · R40 300 400 · R40-300-400

Brand
FLEXTECH
Item
Silicone SAE J20 Heater Hose Reducer, 3 in to 4 in, 3 in Length, Blue
Category
Silicone SAE J20 Heater Hose Reducers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

FLEXTECH
Manufacturer Part Number
R40-300/400
Type
Blue, Silicone, Silicone
Hose Lg
3 in
Hose Color
Blue
Temp. Range
-65° to 350°F
Hose Tube Material
Silicone
Hose Cover Material
Silicone

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

FLEXTECH Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The FLEXTECH Hose Reducer (MPN R40-300/400) is a blue silicone SAE J20 heater hose reducer with a 3 in to 4 in hose inside diameter and 3 in hose length. It is constructed from silicone tube and cover materials, rated for a temperature range of -65° to 350°F.

Frequently Asked Questions

What is the FLEXTECH Hose Reducer R40-300/400 used for?

The FLEXTECH Hose Reducer R40-300/400 is a silicone SAE J20 heater hose reducer used to transition between 3 in and 4 in inside-diameter hoses in industrial heating, cooling, and fluid-handling systems. Its silicone construction withstands -65° to 350°F, making it suitable for engine and process applications.

What are the specifications of the FLEXTECH Hose Reducer R40-300/400?

The FLEXTECH Hose Reducer R40-300/400 has a 3 in to 4 in hose inside diameter, 3 in hose length, blue silicone tube and cover materials, and a temperature range of -65° to 350°F. It meets SAE J20 standards for heater hose performance.

Where to buy the FLEXTECH Hose Reducer R40-300/400 worldwide?

3G Electric supplies the FLEXTECH Hose Reducer R40-300/400 worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this silicone SAE J20 heater hose reducer.

How to install the FLEXTECH Hose Reducer R40-300/400?

To install the FLEXTECH Hose Reducer R40-300/400, ensure both hose ends are clean and dry. Slide the reducer over the smaller 3 in hose, then connect the larger 4 in hose. Use appropriate clamps on both ends, tightening to manufacturer torque specs. Avoid over-tightening to prevent silicone damage.

Used in

Common applications for FLEXTECH
Industrial burner systems — FLEXTECH silicone heater hoses for coolant circulation in preheat loops
Turbocharged diesel engines — FLEXTECH charge air cooler hoses for intake air routing
HVAC equipment — FLEXTECH vacuum hoses for pneumatic control lines
Marine engine cooling — FLEXTECH SAE J20R3 heater hoses for raw water and closed-loop systems
Generator sets — FLEXTECH 45° elbow hoses for coolant line routing in confined spaces
Compressed air systems — FLEXTECH silicone hoses for high-temperature air transfer

FLEXTECH Products

3G Electric supplies FLEXTECH silicone sae j20 heater hose reducers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from FLEXTECH

View all FLEXTECH parts
Blue silicone SAE J20 heater hose reducer with 1 3/4 in to 2 1/4 in inside diameter, 3 in length. Constructed from silicone tube and cover materials, rated for -65° to 350°F. Used to connect two different-diameter heater hoses in cooling systems
FLEXTECH
Blue silicone SAE J20 heater hose reducer with 1 3/4 in to 2 1/4 in inside diameter, 3 in length. Constructed from silicone tube and cover materials, rated for -65° to 350°F. Used to connect two different-diameter heater hoses in cooling systems
Blue silicone SAE J20 heater hose reducer with 2 1/2 in to 3 in inside diameter, 3 in length. Constructed from silicone tube and cover materials, rated for -65° to 350°F. Used to connect different-diameter heater hoses in cooling systems
FLEXTECH
Blue silicone SAE J20 heater hose reducer with 2 1/2 in to 3 in inside diameter, 3 in length. Constructed from silicone tube and cover materials, rated for -65° to 350°F. Used to connect different-diameter heater hoses in cooling systems
Blue silicone SAE J20 heater hose reducer with 2 3/4 in to 3 in inside diameter and 3 in length. Silicone tube and cover, rated -65° to 350°F. Used to connect different-diameter hoses in cooling systems
FLEXTECH
Blue silicone SAE J20 heater hose reducer with 2 3/4 in to 3 in inside diameter and 3 in length. Silicone tube and cover, rated -65° to 350°F. Used to connect different-diameter hoses in cooling systems
Blue silicone SAE J20 heater hose reducer with 1 1/4 in to 1 3/4 in hose inside diameter and 3 in length. Constructed from silicone tube and cover materials, rated for -65° to 350°F. Used to connect different-diameter heater hoses in cooling systems
FLEXTECH
Blue silicone SAE J20 heater hose reducer with 1 1/4 in to 1 3/4 in hose inside diameter and 3 in length. Constructed from silicone tube and cover materials, rated for -65° to 350°F. Used to connect different-diameter heater hoses in cooling systems
Blue silicone reducer with 3-inch length, reducing from 3.5-inch to 3.25-inch inner diameter. Both tube and cover are silicone, rated for -65° to 350°F. Used to connect different-diameter heater hoses in engine cooling, process heating, and HVAC systems
FLEXTECH
Blue silicone reducer with 3-inch length, reducing from 3.5-inch to 3.25-inch inner diameter. Both tube and cover are silicone, rated for -65° to 350°F. Used to connect different-diameter heater hoses in engine cooling, process heating, and HVAC systems
Blue silicone SAE J20 heater hose reducer with 2 3/4 in to 3 1/2 in inside diameter, 3 in length. Constructed from silicone tube and cover, rated for -65° to 350°F. Used to connect different-diameter heater hoses in cooling systems
FLEXTECH
Blue silicone SAE J20 heater hose reducer with 2 3/4 in to 3 1/2 in inside diameter, 3 in length. Constructed from silicone tube and cover, rated for -65° to 350°F. Used to connect different-diameter heater hoses in cooling systems
Blue silicone reducer for connecting two different-diameter heater hoses. Both tube and cover are silicone, rated for -65° to 350°F. 3-inch hose length. Suitable for high-temperature coolant lines in automotive or industrial systems
FLEXTECH
Blue silicone reducer for connecting two different-diameter heater hoses. Both tube and cover are silicone, rated for -65° to 350°F. 3-inch hose length. Suitable for high-temperature coolant lines in automotive or industrial systems
Blue silicone SAE J20 heater hose reducer with 1 3/4 in to 2 in inside diameter and 3 in length. Silicone tube and cover materials. Temperature range -65° to 350°F. Used to connect heater hoses of different diameters in cooling systems
FLEXTECH
Blue silicone SAE J20 heater hose reducer with 1 3/4 in to 2 in inside diameter and 3 in length. Silicone tube and cover materials. Temperature range -65° to 350°F. Used to connect heater hoses of different diameters in cooling systems