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Cooling & Oil System > Radiator Hose Fittings

Browse radiator hose fittings designed to improve coolant flow, simplify hose routing and support custom cooling system setups. Our range includes in-line radiator hose fillers, hose barb reducers and aluminium hose couplers suited to engine swaps, cooling upgrades and replacement applications. Built for durability and reliable sealing, these radiator hose fittings help improve cooling performance and make custom installations easier. Order online with fast Australia-wide delivery.

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Calflow 1-1/2" to 1-3/4" Hose Barb Reducer Coupler with 1/8" NPT Port

Cal Custom
$0.00 - $0.00
$0.00
$25.85
$25.85 - $25.85
$25.85
in stock

This fitting has a 1-1/2” Barb and a 1-3/4” barb with a hose stop flange to keep the coupler centred in the splice connection. Commonly used to co...

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$0.00 - $0.00
$0.00
$25.85
$25.85 - $25.85
$25.85

Cal Custom In-Line Radiator Hose Filler 1½" Hose W/ 1½" Water Fittings Black

Cal Custom
$0.00 - $0.00
$0.00
$86.85
$86.85 - $86.85
$86.85
in stock

Suit 1½” Hose Manufactured from 6061-T6 aluminium Provides a high positive fill point to help keep air out of your cooling system. Black ...

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$0.00 - $0.00
$0.00
$86.85
$86.85 - $86.85
$86.85

Cal Custom In-Line Radiator Hose Filler 1½" Hose W/ 1½" Water Fittings Aluminium

Cal Custom
$0.00 - $0.00
$0.00
$87.30
$87.30 - $87.30
$87.30
in stock

Suit 1½” Hose Manufactured from 6061-T6 aluminium Provides a high positive fill point to help keep air out of your cooling system. 3/8” f...

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$0.00 - $0.00
$0.00
$87.30
$87.30 - $87.30
$87.30

Calflow 1-1/4" to 1-1/2" Hose Barb Reducer Coupler with 1/8" NPT Port

Cal Custom
$0.00 - $0.00
$0.00
$27.85
$27.85 - $27.85
$27.85
in stock

This fitting has a 1-1/4” Barb and a 1-1/2” barb with a hose stop flange to keep the coupler centred in the splice connection. Commonly used...

View full details
$0.00 - $0.00
$0.00
$27.85
$27.85 - $27.85
$27.85

Calflow 1-1/2" to 1-1/2" Hose Barb Reducer Coupler

Cal Custom
$0.00 - $0.00
$0.00
$27.95
$27.95 - $27.95
$27.95
in stock

This fitting has a 1-1/2” Barb and a 1-1/2” barb with a hose stop flange to keep the coupler centred in the splice connection. Commonly used to co...

View full details
$0.00 - $0.00
$0.00
$27.95
$27.95 - $27.95
$27.95