Mueller W01056 1-3/8 x 1-1/8 Coupling

The Mueller W01056 1-3/8 x 1-1/8 Copper CxC Coupling is a high-performance reducing coupling engineered specifically for technical HVACR and refrigeration applications. Manufactured from premium wrot copper (UNS C12200), this solder-joint fitting is designed to join ASTM B280 and ASTM B88 seamless copper tubing. It provides a reliable transition between 1-3/8" OD and 1-1/8" OD lines, making it an essential component for system modifications and refrigerant line sizing. Built to withstand the rigorous demands of pressurized systems, this fitting is UL recognized for operating pressures up to 700 PSI at 250°F. The precision-engineered Cup-by-Cup (CxC) connections ensure a consistent capillary gap for optimal solder flow and joint integrity. This lead-free fitting complies with ASME B16.22 and NSF 61G standards, ensuring it meets all modern building codes for both potable water and mechanical HVAC installations. Rely on the industry-standard Streamline brand for dependable flow control and leak-proof performance in commercial and residential projects.

• High Pressure Rating: Verified for 700 PSI performance, making it ideal for modern high-pressure refrigerants.
• Precision Tolerance: Manufactured to ASME B16.22 specifications to ensure a perfect solder joint fit every time.
• Durable Construction: Made from 99.9% pure wrot copper for superior corrosion resistance and thermal conductivity.
• Code Compliant: Meets NSF 61G and ASTM B75 standards for safe use in potable water and HVAC systems.
• Industrial Versatility: Engineered for above-ground use in air conditioning, heating, and refrigeration circuits.

Is this coupling compatible with R-410A systems?
Yes, the 700 PSI pressure rating at 250°F makes this Mueller Streamline fitting suitable for high-pressure refrigerant applications, including R-410A.

What is the difference between the OD and ID sizing for this part?
In HVACR, this is a 1-3/8 x 1-1/8 OD coupling. In plumbing applications, this corresponds to the nominal 1-1/4 x 1 ID size.

Can this fitting be used in underground installations?
While copper is resilient, these specific wrot copper pressure fittings are primarily designed and code-approved for above-ground potable water and mechanical systems.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.