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Silicone Rubber Blue Heater Hose, Inch OD, Inch ID

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Description & Features

The FLEXFAB Silicone Rubber Blue Heater Hose is built for high-demand applications especially in challenging engine environments. This hose boasts a burst pressure of 200 psi with a continuous operating temperature range from -65deg;F to 350deg;F and is reinforced with nylon fiber to withstand coolant additives.

Designed to handle heavy-duty pressure connections it features hose I.D. ranging between 0.730 and 0.770 inches and O.D. from 1.08 to 1.09 inches. Recommended fitting attachments include Oetiker Steplessreg; Ear Pinch Clamps Oetiker Steplessreg; Spring Clamps and Trident #730 S.S. Constant-Torquereg; Clamps while avoiding serrated slotted or wire type clamps.

This specialized application hose is optimized for use in refrigeration air conditioning pressure washers and various other industries that require durable and reliable high-pressure connections.

Supplier Part Number: 5526-075X25

Specifications

Color
Blue
grp Fitting Attachments
Oetiker Stepless® Ear Pinch Clamp, Oetiker Stepless® Spring Clamp, Trident #730 S.S, Constant-Torque® Clamp
Hose Type
1-Ply Standard Heater Hose
Inside Diameter
3/4 in
Nominal Size
3/4 in
Series
5526 Series
Tube Material
Silicone

Product Questions & Answers (3)

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Question by: Carl M on Nov 13, 2025, 7:05 AM
Hey, can I use regular hose clamps with this stuff, or do I need somethin' special?
Answer by: Customer Support on Nov 15, 2025, 6:42 AM
For best results and a reliable seal, it's recommended to use Oetiker Stepless Ear Pinch Clamps, Oetiker Stepless Spring Clamps, or Trident #730 S.S. Constant-Torque Clamps. Avoid using serrated, slotted, or wire-type clamps as they might damage the hose.
Question by: Tammy C on Mar 5, 2026, 7:54 PM
got a heater hose run that sees some real heat, what temp range will this blue silicone hose actually handle?
Answer by: Customer Support on Mar 7, 2026, 6:29 AM
For temperature, it is rated for continuous service from -65°F up to 350°F, which fits the kind of hot engine-bay heater hose duty it is meant for.
Question by: Rod H on Oct 24, 2025, 3:21 PM
clamp type matters here, what kind should I be using with this hose, and are there any I need to stay away from?
Answer by: Customer Support on Oct 26, 2025, 8:20 AM
Oetiker Stepless Ear Pinch Clamps, Oetiker Stepless Spring Clamps, and Trident #730 S.S. Constant-Torque Clamps are all solid choices for this hose. What you want to avoid is serrated, slotted, or wire type clamps. Those styles can cut into the silicone over time and cause failure at the connection point, so stick with the smooth, even-clamping options listed.

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