Simple, permanent installation of the Camco RV 12" Supreme Permanent By-Pass Kit for 10 Gallon Tanks allows you to reduce the amount of antifreeze required to winterize yuor RV by bypassing the water heater when you winterizing. Save gallons of antifreeze by not filling your water heater with antifreeze. Made with crimp-resistant nylon reinforced hose and sturdy, brass valves for non-restrictive flow. Permanent by-pass kit Permanent by-pass kit For 10 Gallon RV Water Heaters Brass valves provide non-restrictive flow Save gallons of Antifreeze by not filling your water heater with antifreeze when you winterize