ProBite's lead-free push connectâ„¢ stop end connectors are easy to install and easy to remove. Using Push Connectâ„¢ technology, our stop ends can be installed in seconds without the use of glues, calks and special plumbing tools. Great for pressure testing, central heating systems or any application where the flow of water might need to be interrupted. ProBite's lead-free push connectâ„¢ stop ends are great for direct or indirect cold water systems, unvented and vented hot water systems and more.