Save on antifreeze when you winterize with this Quick-Turn Water Heater Bypass Kit. Permanently installed unit features single valve operation which allows you to bypass your water heater effortlessly. Improved valving system with 100% shutoff and brass back-flow preventer makes it easier than ever to save up to 10 gallons of antifreeze. Sturdy brass back-flow preventer and 100% shutoff valve lets you bypass the water heater with a single turn. For winterizing and storage only. Works on 6 and 10-gallon water heaters. Single valve lets you bypass your water heater Includes back-flow preventer and shutoff valve | Quick Turn By-Pass Kit