[. . . ] [. . . ] See the chart below to determine which size to use. 1 /2" 3 /4" AQ 125 B AQ 125 FX AQ 125 HX GWH-425-HN GWH-425-EF AQ 250 SX AQ 250 SXO GWH-635-ES GWH-635-ESO Replacing Union Connection · Remove Union Assembly Nut · Install proper sized Union Assembly Connector, ensuring gasket is installed. (See Fig 1) (Blue ring is for cold and red ring is for the hot valve) Note: The hot valve has connector for the pressure relief valve (see Fig 2) · See Webstone Valve instruction for further installation instructions. Union Assembly Nut Union Assembly Connector Gasket F ig 2 [. . . ] [. . . ]