The following navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
Large (2-1/2" through 10") 900 series valves are no longer in production, see 300 or 400 series valves for approved replacement. Small 900 series valves 1/4" through 1 1/2" and 900 series repair kits and parts are still available.