5/16" Brass Compression Fitting Assembly

Product Overview

The Uponor A4020313 QS-Style Compression Fitting Assembly is a precision-engineered brass connection designed for use with 5/16-inch Quik Trak® radiant heating and hydronic distribution systems. This fitting provides a secure, leak-resistant connection between R20 and 5/16-inch tubing, ensuring consistent system integrity under demanding pressure and temperature conditions. Manufactured from high-grade brass, it delivers reliable performance for professional hydronic installations requiring durability and precision alignment.

Technical Specifications

• Manufacturer: Uponor, Inc.
• Model Number: A4020313
• Description: QS-Style Brass Compression Fitting Assembly
• Reference Number: 210674
• Series: QS (Quik Trak®) Style
• Nominal Size: R20 x 5/16 in
• Connection Type: Compression fitting
• Material: Brass
• Hex Size: 1.37 in (34.8 mm)
• Pressure Rating: 125 psi (maximum working pressure)
• Temperature Rating: 220°F (104°C) maximum operating temperature
• Application:
  • Hydronic radiant heating systems
  • Quik Trak® floor panel tubing connections
  • Manifold and distribution loop terminations
• Function: Provides compression-sealed tubing connection for secure fluid transfer within closed-loop hydronic systems
• Design Features:
  • QS-Style geometry for precise fit with Uponor components
  • Machined brass construction for dimensional accuracy and corrosion resistance
  • Compression assembly ensures uniform seal integrity under pressure
• Mounting Orientation: Inline compression connection
• Installation: Use standard compression tools; tighten per Uponor installation torque guidelines
• Compliance:
  • Manufactured to ASTM and CSA performance standards for hydronic fittings
  • NSF/ANSI 61 and 372 compliant for system safety and material integrity
• Service Application: Closed-loop hydronic heating and cooling systems

Summary

The Uponor A4020313 QS-Style Brass Compression Fitting Assembly is a 5/16-inch Quik Trak® connection rated for 125 psi and 220°F operation. Featuring R20 x 5/16-inch compression ends and a 1.37-inch hex body, it provides durable, precision-engineered performance for professional hydronic and radiant heating system installations.