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.
The Z415U Type U adjustable strainer extension allows indirect waste to enter through discharge piping above the drain. Typically used as a drain extension, but also as a hub drain for indirect waste.