Aqua Pro 27909 8" Permanent By-pass Kit for 6 Gallon Tanks Aqua Pro winterizing kit makes preparing your RV or boat for winter storage All components are made of the highest quality, food grade, non toxic materials for trouble free winterization Kit lets you by-pass the water heater when winterizing water lines to save anti-freeze 1/4 turn valves to quickly and easily bring water heater back on line For 6 gallons