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Silicone Rubber Blue Coolant Hose, 2.39 Inch OD, 2.00 Inch ID, 36 Inch Long

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Description & Features

This silicone rubber blue coolant hose is a versatile solution for various industrial applications in refrigeration, air conditioning, pressure washers, and engine and air brake systems.

Constructed with four plies of reinforced polyester fabric, the hose is coated with a specially compounded silicone elastomer, ensuring durability and reliability. With an inside diameter of 2 inches and an outside diameter of 2.39 inches, it meets the performance requirements of SAE J20 R1 Class A and TMC RP303B Class 1 Grade 1.

Designed for continuous operation within a temperature range of -65deg;F to 350deg;F, this 36-inch long hose is built to withstand demanding environments. It also complies with the specifications of most original equipment manufacturers (OEM) for trucks.

With a burst pressure of 400 psi, this FLEXFAB hose ensures robust and dependable performance across various industrial needs.

Supplier Part Number: 5581-200

Specifications

Burst Pressure
400
Brand
Flexfab
Brand
Flexfab
Pack Size
36.00
UOM
LN3
Hose I.D.
2
Hose O.D.
2.39
Length
36
Supplier Part Number
5581-200
Alternate Part Numbers
Alternate Part Number 5581-200, Alternate Part Number C1KG56, Alternate Part Number MI-08749338, Alternate Part Number MINO-01591X98014
Product Weight
3.66 lbs

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Product Questions & Answers (6)

Question by: Jimmy B on Aug 9, 2025, 10:23 AM
What kinda temperature range can this hose handle?
Answer by: Customer Support on Aug 10, 2025, 9:19 PM
Continuously, this hose is good from -65°F all the way up to 350°F.
Question by: Tommy P on Nov 23, 2025, 3:52 PM
i got a straight 2 inch coolant line to replace. is this hose actually 2" on the inside, and how long is the piece?
Answer by: Customer Support on Nov 24, 2025, 9:31 PM
It is a 2.00 inch inside diameter hose with a 2.39 inch outside diameter, and it comes as a 36 inch length.
Question by: Harold C on Mar 2, 2026, 10:58 AM
Running a big diesel on a medium-duty haul truck and need to swap out the upper coolant hose. This one measures right at 2 inch ID where it connects. That gonna be a match?
Answer by: Customer Support on Mar 4, 2026, 8:56 AM
A 2.00 inch ID is exactly what this hose carries, so the bore size lines up. The outside diameter runs 2.39 inches, which matters when you're routing through tight brackets or clamp positions. At 36 inches long, there's usually enough length to cut to fit if your run is shorter. Four-ply silicone construction with polyester reinforcement means it holds its shape under pressure and heat without collapsing, which is what you want on a working diesel.
Question by: Brent W on Dec 20, 2025, 4:35 PM
hose says it goes up to 350 degrees, is that continuous or just a peak rating?
Answer by: Customer Support on Dec 22, 2025, 7:47 AM
Continuous operation, not just a spike tolerance. The -65°F to 350°F range covers normal ongoing use, so running it hot day in and day out falls well within what it's built for. The four-ply polyester-reinforced silicone construction holds up under sustained heat a lot better than standard rubber hose.
Question by: Kirk M on Apr 15, 2025, 9:13 AM
trying to replace a straight coolant hose, are the measurements on this one 2 inch inside and 2.39 outside for real?
Answer by: Customer Support on Apr 16, 2025, 2:23 PM
The hose is sized at 2.00 inch ID and 2.39 inch OD, and it comes in a 36 inch straight length, so it matches setups that call for those exact dimensions.
Question by: Harold R on Aug 6, 2025, 6:30 PM
What kind of pressure can this hose handle before it busts?
Answer by: Customer Support on Aug 8, 2025, 7:16 AM
This Flexfab hose is built to withstand a burst pressure of 400 psi, which should hold up well in demanding industrial applications.