Hoses & Extensions.

Looking for a reliable hose and extension to make your projects easier? This collection features versatile extension solutions and durable hoses built for long-lasting performance and everyday convenience. Whether you're taking on DIY tasks, home improvement, or professional jobs, these quality tools deliver the precision and efficiency you need. Discover the right hose to help you work smarter and get great results every time.

FAQs

Common questions answered.

Five of the questions we hear most often on carpark and street linemarking gear. Full knowledge base on our FAQ page.

  • 1/4 inch or 3/8 inch hose?

    3/8 inch for higher flow rate and lower pressure drop on long hose runs (typically 30 m and over) or on industrial unit where pump flow is high. 1/4 inch for lighter weight and easier handling on shorter runs (under 15 m) and on professional and homeowner sprayers. Most professional contractors run a 15 m 1/4 inch main hose with a 0.9 m whip on the gun for residential and light-commercial work; long-line and industrial work moves to 3/8 inch. For viscous materials, use the 1/2 inch out-of-manifold step-down technique.

  • What is the step-down technique for viscous materials?

    Best practice from Graco technical: for viscous materials (Level 5 plaster, roof restoration membrane, high-build coatings), use 1/2 inch x 15 m hose out of the manifold and step down to 3/8 inch x 15 m for the second length with a joining nipple. The 1/2 inch first section maximises flow rate from the pump (less pressure drop close to the pump where flow is highest); the 3/8 inch step-down keeps the gun-end manageable for the operator (1/2 inch is too stiff for fatigue-free gun handling). Single piece of long 3/8 inch hose works but pressure drop is higher and flow is reduced on viscous material.

  • Why use a whip hose?

    The whip hose sits between the main hose and the gun, providing a flexible short hose section that reduces operator fatigue from main-hose stiffness at the gun. Standard whip is 0.9 m (3 ft); longer whips available for ladder and high-access work. Without a whip, the main-hose stiffness transfers to the operator's wrist and shoulder over long sessions; the whip absorbs that.

  • RAC X tip extension: when?

    Tip extensions add a rigid extension (typically 150 mm to 600 mm) between the gun and the tip. Use for ceiling work where the operator cannot reach the surface with the gun alone, high-wall work, tight-access work behind cabinets or between studs, and any work where extending the tip reduces operator stretching. Pair with CleanShot extension for tip-side shut-off control.

  • Pressure rating: what matches my sprayer?

    Match hose pressure rating to or above the unit pump max pressure. Magnum unit run up to around 3000 PSI; Ultra and Ultra PC unit run up to 3300 PSI; industrial King 45:1 around 4500 PSI; King E60 6000 PSI; King 70:1 around 7000 PSI. BlueMax II hose range covers 3300 PSI pressure rating across most lengths and diameters; for unit above 3300 PSI confirm the matched high-pressure hose spec with GO before ordering.

Full guide

Choosing the Right Airless Hose or Extension

Graco BlueMax II airless paint hoses, whip hoses, RAC X tip extensions, CleanShot extension assemblies and hose joiners for the Graco airless paint sprayer family. Match hose pressure rating to the unit pump max pressure; match hose length and diameter to the working radius and flow rate.

BlueMax II main hose: 1/4 inch, 3/8 inch, 1/2 inch. Graco BlueMax II Airless Sprayer Hose Range covers 1/4 inch and 3/8 inch hose at multiple lengths (typically 7.5 m, 15 m, 30 m). 3/8 inch for higher flow / lower pressure drop on long runs; 1/4 inch for lighter weight on shorter runs. 1/2 inch ID covers maximum-flow manifold output for viscous materials. Pressure rating must match or exceed unit pump max pressure (3,300 PSI is standard rating on most BlueMax II lengths; check spec for unit above 3,300 PSI like King 70:1).

Step-down technique for viscous materials. Best practice from Graco technical for viscous materials (Level 5 plaster, roof restoration membrane, high-build coatings): 1/2 inch x 15 m hose out of the manifold, step down to 3/8 inch x 15 m for the second length with a joining nipple. Maximises flow rate from the pump while keeping the gun-end manageable for the operator. Single piece of long 3/8 inch hose works but pressure drop is higher.

Whip hose. Graco BlueMax II Airless Whip Hoses sit between the main hose and the gun, providing the operator with a flexible short hose section for gun handling. Standard whip is 0.9 m (3 ft); longer whips available. The whip reduces operator fatigue from main-hose stiffness at the gun. Without a whip, the main-hose stiffness transfers to the operator's wrist and shoulder over long sessions.

RAC X tip extensions and CleanShot. Graco RAC X Tip Extension Range adds a rigid extension between the gun and the tip for ceiling, high-wall and tight-access work where the operator cannot get the gun close to the surface. CleanShot Extension Assembly Range adds the CleanShot tip-side shut-off valve to the extension for combined high-reach + shut-off control. Hose Joiner (1/4 inch to 1/4 inch, 156971) joins two main hose sections for extended runs.

Hose fittings: NPT standard, AU compressor note. Hose fittings on Graco equipment are NPT (National Pipe Tapered) standard. For Graco air-driven units, the compressor-side air fittings are US-spec and require a Nitto adapter for AU compressor lines (per Graco technical, this is the common fitting adjustment on King and Merkur air-driven unit in AU service).

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Not sure which one's right?

Tell us the carpark size, how often you'll use it, and whether you need battery or petrol. We'll come back with a shortlist and a trade quote within the day.

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