Mueller W01034 7/8" Copper Coupling

The Mueller W01034 7/8" Copper Coupling is a professional-grade wrot copper pressure fitting engineered for high-performance HVACR and plumbing systems. Featuring a 7/8" OD (3/4" Nominal) connection with a CxC (Copper x Copper) configuration, this straight coupling is manufactured from UNS C12200 grade copper to ensure maximum conductivity and corrosion resistance. The integrated rolled stop provides a precise internal physical barrier, preventing over-insertion of the tubing and ensuring a positive, consistent flow path for water supply and refrigeration lines.

Built to meet ASME B16.22 and MSS SP-104 standards, this lead-free copper fitting is rated for a continuous operating pressure of 700 PSI at 250°F, making it suitable for both above-ground and underground applications. Whether you are performing a refrigeration line set repair or a potable water system installation, the Mueller Streamline series provides the structural integrity required for leak-free HVAC connections. This fitting is NSF 61G certified and UL recognized, supporting a wide range of residential and commercial service environments.

• Precision Rolled Stop: Features a roll stop to facilitate accurate tube alignment and maintain optimal volume flow without pressure drops.
• High Pressure Rating: Tested to withstand 700 PSI, ideal for modern HVAC/R applications and pressurized water systems.
• Material Purity: Forged from 99.9% pure wrot copper (C12200), ensuring superior durability and dezincification resistance.
• Versatile Compatibility: Seamlessly joins ASTM B280 or ASTM B88 (Types K, L, and M) copper tubing for HVAC technician service calls.

• What is the difference between OD and Nominal size? This fitting is rated as 7/8" OD (Outside Diameter), which corresponds to a 3/4" Nominal size for standard plumbing applications.
• Can this be used for underground water lines? Yes, these copper solder-joint fittings are approved for both above-ground and below-ground potable water-supply piping.
• Is this coupling lead-free? Yes, the Mueller W01034 is NSF 61G certified and meets all federal requirements for lead-free plumbing components.

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.