Mueller Industries AQ17866 Cyclemaster Ball Valve 1-3/8 in

Product Description

The MUELLER INDUSTRIES AQ17866 is a full-port CYCLEMASTER ball valve with an integrated access port, designed for refrigeration and HVAC system service applications. Built from brass with a chromium-plated ball, the AQ17866 provides reduced internal wear and extended seal life across a wide operating temperature range of -40 degrees F to 300 degrees F. Maximum working pressure is 775 psi. The sweat or brazed connection type makes it a standard fit in copper-piped refrigerant circuits. Licensed HVAC technicians and refrigeration mechanics are the primary installers of this component.

The AQ17866 is suited for residential and commercial refrigeration systems where a serviceable isolation point is required. The built-in access port supports pressure testing, refrigerant charging, and system diagnostics without the need for additional Schrader valve fittings. The valve is compatible with all CFC, HCFC, and HFC refrigerants and oils, making it appropriate for both legacy and current-generation refrigerant systems. The 1-3/8 inch line size fits mid-to-large capacity suction and liquid line applications.

Key Features

• Full-port ball construction for unrestricted refrigerant flow
• Chromium-plated ball reduces wear and extends seal service life
• Integrated access port for pressure testing and refrigerant service without added fittings
• Compatible with all CFC, HCFC, and HFC refrigerants and lubricating oils
• Operating range: -40 degrees F to 300 degrees F at up to 775 psi working pressure
• UL Listed and RoHS compliant; manufactured in the USA

Compatibility

Compatible with all CFC, HCFC, and HFC refrigerants and oils. Designed as an OEM-style service valve for copper sweat or brazed refrigerant piping systems with a 1-3/8 inch line size.

Installation Notes

Installation should be performed by a licensed HVAC or refrigeration technician. Recover all refrigerant and depressurize the system before cutting into existing refrigerant lines. Use standard brazing or sweat techniques appropriate to the copper line size; follow applicable local mechanical codes and EPA Section 608 requirements when handling refrigerants. Ensure the valve body is oriented per the flow-direction marking before final brazing, and protect the valve seals from excessive heat during the brazed connection process.