A torpedo level is adapted for use with a non-metallic material such as PVC pipe by providing an attachment device for temporarily affixing the torpedo level in engaging relationship with the plastic pipe without any attendance. In one embodiment, the affixing device is an attachment strip extending along a planar side of the torpedo level and having an adhesive material on its outer side. A cover is adapted to protect the adhesive material when not in use. Another attachment device is a plurality of suction cups which are secured to the planar side and temporarily attachable to a plastic pipe. Another alternative is one or more Velcro straps which are attached to the body of the torpedo level by way of slots formed therein and which are selectably wrapped around a pipe for securing the torpedo level thereto.