Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

FLEXTECH Hose Reducer: 3 in Hose Lg, Blue, Silicone - Silicone SAE J20 Heater Hose Reducers
FLEXTECHSilicone SAE J20 Heater Hose Reducers

FLEXTECH Hose Reducer: 3 in Hose Lg, Blue, Silicone

The FLEXTECH Silicone SAE J20 Heater Hose Reducer (MPN R40-325/350) is a blue silicone reducer with a 3-inch hose length, designed for temperature ranges from -65° to 350°F. Both the hose tube and cover are made of…

SKU 3G-OTH-457303

Brand
FLEXTECH
Item
Hose Reducer: 3 in Hose Lg, Blue, Silicone
Category
Silicone SAE J20 Heater Hose Reducers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
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

Technical Specifications

FLEXTECH
Manufacturer Part Number
R40-325/350
Type
Blue, Silicone, Silicone
Hose Color
Blue
Temp. Range
-65° to 350°F
Hose Tube Material
Silicone
Hose Cover Material
Silicone
View Full Spec Sheet

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 Silicone SAE J20 Heater Hose Reducer (MPN R40-325/350) is a blue silicone reducer with a 3-inch hose length, designed for temperature ranges from -65° to 350°F. Both the hose tube and cover are made of silicone, ensuring durability in demanding industrial heating applications.

Frequently Asked Questions

What is a FLEXTECH silicone heater hose reducer used for?

A FLEXTECH silicone heater hose reducer connects two different-diameter heater hoses in industrial heating systems. It handles temperatures from -65° to 350°F and resists coolant degradation, making it suitable for engine cooling, process heating, and HVAC applications where a tight, durable seal is required.

What are the specifications of the FLEXTECH R40-325/350 hose reducer?

The FLEXTECH R40-325/350 is a blue silicone SAE J20 heater hose reducer with a 3-inch hose length. Both tube and cover are silicone, rated for -65° to 350°F. It reduces from 3.5-inch to 3.25-inch inner diameter, providing a reliable connection in demanding thermal environments.

Where to buy FLEXTECH hose reducers worldwide?

3G Electric supplies FLEXTECH silicone hose reducers worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the R40-325/350 or other FLEXTECH parts.

How to install a FLEXTECH silicone heater hose reducer?

To install a FLEXTECH silicone reducer, cut the hose ends square, lubricate the inside of the reducer and the hose ends with silicone grease, then push the reducer onto both hoses. Secure with constant-torque clamps. Avoid overtightening to prevent silicone damage. Always follow SAE J20 installation guidelines.

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
FLEXTECH Hose Reducer: 3 in_3 1/2 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-300/350). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH
FLEXTECH Hose Reducer: 3 in_3 1/2 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-300/350). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH Hose Reducer: 1 3/4 in_3 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-175/300). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH
FLEXTECH Hose Reducer: 1 3/4 in_3 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-175/300). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH Hose Reducer: 2 1/2 in_3 1/4 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-250/325). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH
FLEXTECH Hose Reducer: 2 1/2 in_3 1/4 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-250/325). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH Hose Reducer: 3 in_4 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-300/400). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH
FLEXTECH Hose Reducer: 3 in_4 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-300/400). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH Hose Reducer: 2 1/4 in_2 3/4 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-225/275). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH
FLEXTECH Hose Reducer: 2 1/4 in_2 3/4 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-225/275). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH Hose Reducer: 2 1/4 in_3 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-225/300). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH
FLEXTECH Hose Reducer: 2 1/4 in_3 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-225/300). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH Hose Reducer: 2 1/2 in_3 1/2 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-250/350). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH
FLEXTECH Hose Reducer: 2 1/2 in_3 1/2 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-250/350). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH Hose Reducer: 2 3/4 in_3 1/2 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-275/350). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.
FLEXTECH
FLEXTECH Hose Reducer: 2 3/4 in_3 1/2 in Hose Inside Dia., 3 in Hose Lg, Blue, Silicone, Silicone (MPN R40-275/350). Key specifications — Hose Cover Material: Silicone; Hose Color: Blue; Temp. Range: -65° to 350°F; Hose Tube Material: Silicone; Brand: FLEXTECH.