Mastercool 90° Hex Style Pressure Control Hoses are a smart upgrade when copper capillary keeps cracking from vibration. Built with 1/4″ SAE hex fittings in a Straight × 90° layout, they’re rated to 600 psi (42 bar) and 200°F (93°C) for dependable pressure control on Aussie job sites. Fair dinkum durable. 

Key features & trade benefits

• Capillary replacement — purpose-built to replace copper capillary runs and avoid vibration-related work hardening failures; fewer call-backs.
• Straight × 90° fittings (1/4″ SAE) — neat routing off pressure controls and receivers in tight panels for cleaner installs.
• Rated to 600 psi / 200°F — confidence for typical HVAC/R pressures and ambient heat on rooftops.
• Wide temp range −20 to 200°F (−29 to 93°C) — dependable across Aussie climates.
• Multiple lengths (12″–48″) — cut downtime by matching the reach without loops or kinks.
• Hex style ends — easy spanner purchase for firm, leak-free tightening.

Why this product matters on real jobs

Ever had a cap tube crack on a vibrating Sydney roof unit? Swap it for a Straight × 90° pressure control hose and route around the guard neatly. No fiddly coils, no stress risers. System back online and the client’s happy — she’ll be right.

Need more hose options? Browse our Refrigerant Hoses to round out your kit.

Pro tip

When replacing capillary with a hose, support the run and avoid tight reverse bends right at the 90° fitting. A small P-clip keeps vibration out of the joint — no worries.

Compatibility & system info

• Thread: 1/4″ SAE (hex style)
• Configuration: Straight × 90°
• Working pressure: up to 600 psi (42 bar)
• Operating temp: −20 to 200°F (−29 to 93°C)
• Use: Pressure control hookups; capillary replacement where vibration is an issue.

Built for Aussie conditions

From humid Brisbane plant rooms to summer Sydney rooftops, the temp range and compact 90° fitting help keep installs tidy and robust in the heat.

What’s included

• 1 × Mastercool 90° Hex Style Pressure Control Hose (selected length)

Specifications

Warranty & returns

Covered by our standard returns policy. See Shipping & Returns. Installations must comply with Australian standards and site safety rules.

FAQs

Do these hoses really replace copper capillary?
Yes — they’re designed for that task and specifically resist vibration-induced work hardening. Follow good support/strain-relief practice.

Which length should I choose?
Pick the shortest length that avoids tight reverse bends. Options are 12″, 18″, 24″, 36″ and 48″ (see part numbers above).

Will 1/4″ SAE fit standard service hardware?
Yes — they use common 1/4″ SAE threads; adapters are available if you need to step to 5/16″ or 3/8″. See the related accessories below.

Related products

• Mastercool 90410 Flex Adapter — handy when you need to convert 1/4″ hose to 5/16″ on minisplits.
• C&D CD2038 3/8″M × 1/4″F Swivel Adapter — useful when stepping hoses on manifold or pump ports.
• Mastercool 1/4″ Control Valve — add positive shut-off at the hose end to reduce losses and mess.