Portals Plus, the premier manufacturer of stock rooftop accessories, proudly announces the next generation of tool-free ReRoof Drains! Portals Plus has developed a unique ReRoof Drain with a rubber seal that requires NO TOOLS to activate. The seal is instantaneous as the ReRoof Drain is inserted into the existing pipe! Years of research and testing have resulted in this unique seal that actually seals tighter as water pressure increases from backups. Hard to believe, but testing done by the engineering firm that designs the seals for America's deep-diving nuclear submarines proves that it with-stands over a 50-feet pressure head of water, both with slow increases in pressure and sudden surges from 0 to 50-feet. The seal was found to resist leaking better than cast iron pipe! During the testing, the cast iron pipe developed porosity leakage from the 50-feet pressure head, but the seal held tight.