I built a rectangular box. Its purpose, when installed, was to hide overhead kitchen pipes. Since these pipes included two water shut-off valves (not shown), an access panel (shown) was added to the box using construction adhesive around the edges. The photo shows the access panel about to be flipped over and glued to the box. When the box was installed, if a person needed access to the shut-off valves in the kitchen ceiling, he or she can get a ladder, remove the detachable plastic panel using a screwdriver, and reach the shutoff valves without having to remove two layers of sheetrock.