3/4" x R20 Copper Adapter

Product Overview

The Uponor A4332075 Copper Adapter is a QS-Style brass fitting engineered to transition R20 connections to 3/4-inch copper tubing. Designed for hydronic, plumbing, and mechanical systems, this adapter provides a reliable interface between Uponor R20 connections and soldered copper assemblies. Built to withstand elevated temperature and pressure service conditions, it ensures consistent sealing performance and dimensional integrity in professional-grade installations.

Technical Specifications

• Model: A4332075
• Manufacturer: Uponor
• Series: QS-Style
• Product Type: Copper Adapter Fitting
• Connection Type: R20 x 3/4 in. Copper (C x C)
• Nominal Size: 3/4 inch
• Hex Size: 1.0625 inches
• Overall Length: 1.4 inches
• Material: Brass body with copper connection interface
• Working Pressure: 125 PSI
• Temperature Rating: 220°F (104°C)
• Application: Transition fitting for hydronic and potable water systems using R20 and copper piping
• Installation Method: Sweat solder (C x C) and mechanical R20 connection
• Compliance: Lead-free; meets ASTM and NSF performance standards for potable water and heating applications

Professional Notes

Install in accordance with Uponor installation procedures. Use appropriate heat and soldering methods for copper-to-copper joints, and torque the R20 mechanical connection using the 1.0625-inch hex for a secure fit. Suitable for hydronic, domestic hot water, and mixed-material systems where brass-to-copper transitions are required. Ensure pressure testing is performed before system commissioning.

Summary

The Uponor A4332075 QS-Style Copper Adapter provides a transition from R20 to 3/4-inch copper connections. Constructed from brass with a 1.0625-inch hex and 1.4-inch overall length, it is rated for 125 PSI at 220°F and designed for professional plumbing and hydronic installations requiring mixed-material compatibility.