The SunQuest System kit is recommended for all roof mounted SunQuest Solar Heating Systems of 4 or more panels. The System Kit includes all the valves, connectors, adaptors and end pieces needed to install your SunQuest System properly as well as High Wind Roof kits for extra security. The System Kit will ensure maximum performance and ease of operation and maintenance of your Solar Heating System. Each System Kit contains a 3-way valve, vacuum relief valve, couplers, adapters, end caps and High Wind Roof Mounting kits.