19252-ZW9-000 Water Tube Grommet - Overview. The 19252-ZW9-000 Water Tube Grommet is a critical component of the Honda marine engine rigging system, specifically designed to seal and protect water tubes. It ensures water flow integrity by preventing leaks and safeguards tubing from abrasion or damage, which is essential for maintaining the engine's cooling system performance. Made from high-quality rubber, this genuine OEM grommet fits exactly into the designated water tubing system, ensuring se