Mueller W01025 5/8 x 3/8 Coupling

The Mueller W01025 5/8 x 3/8 Copper CxC Coupling is a professional-grade wrot copper reducing coupling engineered for high-pressure HVACR applications. Designed to meet ASME B16.22 and ASTM B75 standards, this Streamline copper fitting provides a seamless transition between 5/8-inch and 3/8-inch OD tubing. As a veteran-preferred solder joint reducer, the W01025 ensures maximum flow efficiency and structural integrity in both suction and liquid lines. This refrigeration copper coupling is manufactured from UNS C12200 grade copper, offering superior thermal conductivity and corrosion resistance. Whether you are performing a mini-split installation or a commercial refrigerant line repair, this fitting maintains a tight solder connection under extreme temperature cycles. Its precision-machined CxC (Copper to Copper) ends allow for consistent capillary action during brazing, reducing the risk of leaks in high-stakes HVAC systems. Rely on this Mueller Streamline component for dependable performance in demanding refrigeration and plumbing environments.

Key Benefits

• Industrial Compliance: Manufactured to ASTM B75 and ASME B16.22 specifications for reliable high-pressure operation.
• Material Integrity: Constructed from 99.9% pure wrot copper to prevent dezincification and ensure long-term durability.
• Precision Engineering: Specialized reducing coupling design facilitates smooth refrigerant flow with minimal pressure drop.
• Versatile Application: Fully compatible with ACR, Type L, and Type K copper tubing in residential and commercial systems.
• Thermal Performance: Rated for temperatures ranging from -40°F to 250°F, ideal for diverse refrigeration cycles.

Common Questions

Can this fitting be used with high-pressure refrigerants like R-410A?
Yes, the Mueller W01025 is a wrot copper pressure fitting designed to withstand the operating pressures associated with R-410A and other common refrigerants when installed using proper brazing techniques.

Is the 5/8 x 3/8 measurement based on nominal or OD size?
In HVACR applications, these measurements refer to the Outside Diameter (OD). For plumbing applications, this is equivalent to a 1/2" x 1/4" nominal size.

Does this coupling require flux for brazing?
When joining copper-to-copper with a phosphorus-bearing alloy (like BCuP series), flux is generally not required, though nitrogen purging is always recommended to prevent internal oxidation.

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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.