The Port Cap for 1-1/4" Stainless Steel Manifold by Mueller Streamline is designed to securely seal unused ports in your manifold system. Made from high-quality stainless steel, this cap ensures durability and resistance to corrosion, making it suitable for various applications. The 1-1/4" size fits standard stainless steel manifolds, providing a tight seal to prevent leaks and maintain system integrity. This port cap is essential for optimizing manifold performance and is compliant with industry standards, making it a reliable choice for both residential and commercial plumbing systems.