Abstract: The present invention provides a rigid and partially hollow dome-shaped utility line coupling protector having first and second apertures for the insertion and removal of the male and female ends of a utility line. An optionally recessed bottom cover is provided as a seal against fluids and debris. An adjustable aperture adapter cap having a plurality of perforated, nested sections is carried within each aperture in order to accommodate various sized utility lines and, further, to provide a fluid and debris-resistant barrier. In order to prevent horizontal movement of the coupling and its accidental disconnection, a first and second coupling stop, and a plurality of ways dimensioned for receiving generally inverted U-shaped washers are provided. Downwardly extending projections formed on the bottom of the device engage the ground to prevent movement of the device during use. Through-holes for receiving nails, stakes, or the like are formed on the device for further securing said device to the ground.