Skip to the beginning of the images gallery

FLEXFAB HOSE

Description & Features

Constructed from four-ply silicone, this 3/4" ID hose from Flexfab is built for demanding thermal and mechanical conditions found in industrial and heavy-duty engine applications. The multi-ply silicone construction provides flexibility across a wide temperature range while maintaining consistent shape and resistance to coolant, air, and other compatible media.

The Flexfab 5581 series is a well-established product line for radiator, charge air, and general coolant routing where silicone durability is required. The 3/4" inside diameter suits a range of standard industrial fittings and connections.

SKU: FLX5581-075

Supplier Part Number (MPN): 5581-075

Specifications

Alternate Part Numbers Alternate Part Number 5581-075	Brand Flexfab	Brand Flexfab	Pack Size 12.00	UOM FT	Supplier Part Number 5581-075	Product Weight 0.64 lbs

Product Questions & Answers (2)

Question by: Lee M on Sep 13, 2025, 2:30 PM

Running a 3/4" coolant line on a piece of heavy equipment and need something that'll hold up to heat without getting brittle on me. This silicone hose any good for that kind of work?

Answer by: Customer Support on Sep 15, 2025, 6:12 AM

Four-ply silicone construction handles thermal stress a lot better than standard rubber hose, so for high-heat coolant routing on heavy equipment it's a solid choice. The multi-ply layering keeps it from collapsing or losing shape even when temperatures swing hard in either direction. It stays flexible across a wide range, which matters when you've got vibration and movement working against the hose over time. The 3/4" ID fits standard industrial fittings, so getting it connected shouldn't be a hassle.

Question by: Curt R on Aug 16, 2025, 6:21 PM

What size is the inside of this hose? Gotta make sure it fits my connections.

Answer by: Customer Support on Aug 18, 2025, 6:12 AM

It's got a 3/4" inside diameter, so it should fit any standard 3/4" fittings you've got.