Refrigerant Hoses

High-pressure, barrier-lined refrigerant hoses from Mastercool, Yellow Jacket, and Imperial.

Whether you need standard 1/4" sets for R134a, 5/16" lines for R410A/R32, or wide-bore 3/8" hoses for rapid evacuation, this collection covers all HVAC/R applications. We stock hoses with ball valves, low-loss fittings, and permeation-resistant linings.

Quick Guide: Hose Colors & Functions

Standard manifold sets follow a universal color code to prevent cross-contamination and safety hazards.

Choosing the Right Fitting Size

• 1/4" SAE: The standard fitting for R22, R134a, and R404A systems.
• 5/16" SAE: Required for most modern R410A and R32 mini-splits (to prevent connecting lower-pressure tools to high-pressure systems).
• Low-Loss vs. Ball Valve:
  • Low-Loss Fittings: Automatically close when disconnected to prevent refrigerant spray (burns) and loss.
  • Ball Valves: Manual shut-off valves inline (usually 6 inches back from the tip) for precise control.