Quickly flush away salt, sand, silt, and more…simply with your standard garden hose. This device pumps fresh water through your cooling system to prevent clogging and corrosion. Attwood Corporation has been an award-winning leader in engineering, testing, and manufacturing the highest quality marine products for over 100 years. We deliver safe and reliable lighting, fuel systems, water systems, seating & pedestals, swim ladders, custom upholstery, and general marine accessories that are easy to install and meet regulatory compliance.