A pipe straight elbow is a fitting used in plumbing or piping systems to change the direction of the pipe. Unlike a regular elbow, which changes the direction by typically 90 degrees, a straight elbow maintains the direction of the pipe but alters its elevation. It’s essentially a straight piece of pipe with one end slightly raised or lowered compared to the other, allowing for gradual changes in elevation while keeping the overall direction of the pipe straight. These fittings are used in various applications where maintaining a constant flow or avoiding obstacles is necessary.