The Mueller W03050 45° elbow is a high‑quality copper pressure fitting designed for use in plumbing, HVAC, and refrigeration systems. Manufactured in Mueller’s Streamline® line, this elbow is made from wrot copper and intended for solder (sweat) joint (C × C) connections. It enables a smooth 45° directional change in copper piping while maintaining optimal flow characteristics. The part is rated for 700 psi operating pressure at up to 250 °F, meeting rigorous industry standards.