Outus 3/4" ID Silicone Heater Hose 25 ft Roll (Blue) — Reinforced 85 PSI, High-Temp Resistant

Outus 3/4" ID Silicone Heater Hose is a 25-foot, reinforced blue silicone coolant hose designed for durable, high-temperature automotive and industrial fluid transfer.

This heavy-duty silicone hose is built to replace worn heater and radiator lines, run custom plumbing runs, or create a more heat-resistant routing for coolant, hot water, steam and mild chemical services. Constructed with a polyester braid reinforcement and a smooth silicone jacket, it delivers greater heat and aging resistance than standard EPDM hoses while remaining flexible and easy to work with. The coil format lets you cut the exact length needed for repair or fabrication without buying multiple preformed lines.

How does this hose handle high temperatures and pressure?

The Outus silicone hose is engineered for demanding temperature and pressure ranges, operating reliably from -40°F up to 230°F (-40°C to 160°C) and rated for working pressures up to 85 PSI (burst around 170 PSI). Its silicone compound resists hardening and cracking under repeated heat cycles while the internal braid keeps strength and shape under pressure.

• Temperature range: -40°F to 230°F (-40°C to 160°C)
• Working pressure: up to 85 PSI; burst ≈ 170 PSI
• Polyester braid reinforcement for dimensional stability
• Maintains flexibility under heat load

Will this hose fit my vehicle or plumbing needs?

This is a 3/4" nominal heater hose with an actual inner diameter of 19 mm and an outer diameter of 27 mm, supplied as a continuous 25-foot roll so you can trim custom lengths. Its diameter suits many common heater core, radiator bypass, and custom cooling plumbing applications; confirm port sizes before cutting to ensure compatibility.

• Inner diameter: 19 mm (3/4")
• Outer diameter: 27 mm
• Supplied as a 25 ft coil for custom cuts
• Works with standard clamps and fittings for heater and radiator lines

What fluids and environments is the hose compatible with?

The reinforced silicone formulation resists a wide array of automotive and light industrial fluids: coolant, hot water, steam, air and weak acids/alkalis up to about 25%. It performs significantly better than EPDM when exposed to heat and ozone, though strong solvents or concentrated acids are not recommended.

• Suitable: coolants, hot water, steam, air, weak acids/alkalis (≤25%)
• Resistant to common automotive coolants and thermal media
• Not advised for strong solvents or highly concentrated corrosives
• Kink-resistant design for reliable flow

How easy is it to install and maintain?

Installation is straightforward: cut to length, fit with appropriate hose clamps or barbed fittings, and route away from sharp edges and extreme rubbing. The hose is flexible enough for modest bends without kinking and its smooth inner wall keeps flow steady, while silicone’s longevity reduces how often you’ll need to replace lines.

• Flexible and easy to trim with a sharp blade or hose cutter
• Accepts standard clamps for secure sealing
• Softness under heat may cause slight expansion but does not affect function
• Low-maintenance compared with EPDM alternatives

Who is this for: mechanics, car restorers, DIY enthusiasts, and fabricators who need a long, reliable length of heat-resistant coolant or heater hose for repairs, custom plumbing, or performance upgrades. If you require a flexible, reinforced line that withstands repeated thermal cycling and offers greater longevity than typical rubber hoses, this Outus 3/4" silicone hose roll provides an economical and adaptable solution.