| Brand | Williams Controls |
|---|---|
| Manufacturer Part Number | wm672a |
Check the listing for details. Williams Controls WM672A Three Way Trailer Emergency Air Brake Dash Valve. Condition: New other (see details). Listed at 69.70 USD. Each unit consists of a manually-actuated three-way valve stacked in series with a pressure-actuated two-way valve. The two-way valve provides a non-override safety feature.