There are two shut off valves. A person is near the chilly water line going up for your hot and cold kitchen area faucet. It is actually on the line feeding the RO system. The 2nd one is situated along with the metal tank. Frequent updates: Your system will continually http://www.oregonnewsheadlines.com/news/story/543043/advanced-water-rebrands-to-keep-up-with-changing-office-culture-and-cleaner-hydration-needs.html