3M™ Extended-Range 5' Disk Markers are not for direct buried applications and provide an easy, accurate method of locating flush-mounted facilities which become covered by backfill or other obstructions, such as snow or vegetation.
Positive Identification of underground water facilities
Used to mark handholes (non-metallic lids or covers over flush-mounted facilities)
The 3M™ Disk Marker provides an easy and accurate method of precisely locating flush-mounted facilities, which become covered by backfill. The four-inch disk marker is easily fastened to the underside of non-metallic lids or covers over flush-mounted facilities, such as hand holes, manholes and other grade-level enclosures during construction and maintenance. Disk Markers are not intended for direct burial.
Ideal for marking buried water facilities at a depth of 5 feet (1.5 meters)