US Patent 9551574 Plumber's level

A spirit type level that may be used to plumb any vertical pole or post, may be used to horizontally set an object and may also be used to quickly and easily set a pipe at a selected slope of between 0 and 3 percent. The spirit type level of the invention includes a plurality of differently oriented spirit vials that are secured within the level body in a manner such that, if any one of the spirit vials become broken, or otherwise damaged, it can be easily replaced and the level need not be discarded. The spirit type level of the invention can be quickly and easily removably attached to the object to be leveled thereby freeing the hands of the user to position the object.