Anchor the Unit to the Wall
To install an automatic shutoff valve, find a position on the wall near the washer, electrical outlet and the roughed in water lines.
Next, mark the mounting holes on the wall (Image 1). If the valve is being attached to a wooden board, use wood screws, but if it is being attached to a wallboard or a concrete wall use mounting shields and screws.
Use a masonry bit and a hammer to drill a 3/8" hole in the shields. Then, use the provided screws to anchor the shutoff unit to the wall (Image 2).