Isolator Select features a selectable flow path for directing fluid between the four ports as required for the specific application. Its 1-inch NPT side ports make it suited for filling, purging air or sampling geothermal ground loops and make it easy to add a pressure gauge to the system at the pump. The main valve provides a method for isolating the loop from the rest of the system, simplifying the task of maintenance. The product provides a 1-inch press connection, two plugged 1-inch FIP connections and detachable rotating flange. The product is compatible with press tools and is guaranteed for life. Webstone Valves. www.webstonevalves.com